David Ayer's Suicide Squad, one of the highest-anticipated movies of the year, released this weekend to middling reviews but a stellar box office performance, having grossed an estimated $135 million domestically, thus breaking the August opening record set by James Gunn's Guardians of the Galaxy in 2014 ($94.3 million). As the third entry in Warner Bros.' DC Extended Universe -- following Zack Snyder's Man of Steel and Batman v Superman: Dawn of Justice -- fans had definite expectations going into the theater.

As with all movies, there were things that worked and things that didn't. However, with enough hype and box office receipts, it seems that Suicide Squad 2 may, in fact, happen. Prior to Suicide Squad releasing in theaters, Ayer said that there are possibilities for infinite sequels (which may or may not be R-rated). If a sequel does happen, some things may need to change. But, with a handful of characters having been killed in the movie, a Suicide Squad sequel could use some new members. Here are 15 Characters We Hope To See In A Suicide Squad Sequel.

15. Booster Gold

Booster Gold Fighting Communism

At the moment, news regarding the DC Extended Universe tends to revolve around the core Justice League members -- Batman, Wonder Woman, The Flash, Aquaman, and Cyborg -- and their solo movies, but that doesn't mean Warner Bros. isn't planning on making movies based on other characters as well. Not only is the studio working on a Shazam movie, but they are also planning on releasing a Lobo movie and a Booster Gold outing at some point.

Greg Berlanti has seen outstanding success co-creating DC Comics shows Arrow, The Flash, and Supergirl, but his plans to produce a Booster Gold TV series -- based on the time-traveling superhero of the same name -- haven't panned out. Therefore, he is now working on producing a Booster Gold movie within the DC Extended Universe, which will be written by X-Men: First Class writer Zack Stentz.

Although Booster Gold is not a supervillain, he was a member of the Suicide Squad once upon a time, mistakenly running into Task Force X in an alternate reality in the issue Booster Gold #20. Perhaps the character would be able to appear briefly in a small role in Suicide Squad 2, which would serve as the character's introduction to non-comic book readers before he makes the jump into his own solo movie.

14. Black Adam

Black Adam

As previously mentioned, Warner Bros. is working on a Shazam movie starring Dwayne "The Rock" Johnson as the eponymous character's arch-nemesis Black Adam aka Teth-Adam. Created by writer Otto Binder and artist C. C. Beck, Black Adam was tapped to become the next Shazam, but after being corrupted by the demonic wizard Blaze, Teth-Adam adopted the powers of seven Egyptian deities instead of the seven Greco-Roman deities.

If a Suicide Squad sequel releases before the Shazam movie (which is currently set to come out in April 2019), perhaps Black Adam could be used as a potential tool for the sequel's story, allowing for a chance to introduce audiences to the mystic supervillain. At one point in the comics, Black Adam hires Task Force X to help him defeat the sorceress Circe, who instigated a war between the gods in the aptly-titled War of the Gods crossover event. Although he's not an ideal candidate, the team could benefit from having a mystic being on their side.

13. King Shark

King Shark in DC Comics

Convincing supervillains to act against their own self-interests is what Amanda Waller does, and if you've seen Ayer's Suicide Squad, you know she utilizes nano explosives implanted in the necks of Squad members as a means of guaranteeing servitude. After a while, though, some members are given their freedom and choose to work with Task Force X for payment. But then again, some people simply cannot be trusted to act without some form of leverage against them. King Shark is one of those people (or creatures?).

Fans of The CW's The Flash TV series will recognize the metahuman baddie from the series' second season, but the fact of the matter is, he is not a Flash villain. He's primarily an adversary of Aquaman's, even though he made his debut as one of Superboy's enemies during his tenure in Hawaii. King Shark aka Nanaue has been a Suicide Squad member throughout three different incarnations, but in each one, he typically is forced to serve with the Task Force by either means of torture or by the threat of death (usually by an explosive belt). With audiences already being exposed to someone like Killer Croc, it wouldn't be that far-fetched to think a humanoid shark could be in the cards for the team.

12. Joker's Daughter

Joker's Daughter Duela Dent

If there is any character who has as much of a confounding story as The Joker, it's the Joker's Daughter aka Duela Dent -- but who knows if that's her real name. In the pre-New 52 continuity, the character went by the name Duela Dent, the presumptive daughter of Harvey Dent aka Two-Face. However, over the years, she has also claimed to be the daughter Catwoman, Scarecrow, and, of course, The Joker. In The New 52 continuity, she was identified as being Joker's Daughter.

Although she appeared as a member of the Teen Titans in the pre-New 52 universe, she became a short-term member of the New Suicide Squad when the team was rebooted within The New 52, where she fought alongside her supposed father's lover, Harley Quinn. While she is one of the original members of the squad in this new incarnation, Amanda Waller eventually sends her to Arkham Asylum.

11. Black Manta

Black Manta from DC Comics

Many of the early incarnations of Task Force X consisted of mostly B-villains, but as years went by, more prominent arch-enemies of the universe's heroes were being included, namely supervillains such as the aforementioned Black Adam, Reverse-Flash, as well as Black Manta, the arch-nemesis of the Atlantean hero Aquaman.

Although he made his debut in the late '60s, Black Manta didn't receive an origin story until much later. And like many characters in the DC Universe, he had two consecutive origin stories. However, with The New 52 reboot and DC: Rebirth relaunch, Black Manta now has a definitive origin story: he once was tasked by his father to retrieve Arthur Curry's blood and accidentally killed Arthur's father, Thomas Curry, in the process. Out of revenge, Arthur hunted down Black Manta and mistakenly killed his father, believing him to be the man he was after.

Although he had been reluctant to join the Suicide Squad before, he realized there was nothing better for him to do following the events of Forever Evil. He then joined Task Force X at the tail-end of Suicide Squad Vol. 4 and became a full-fledged member of the New Suicide Squad. If he's introduced in the 2018 Aquaman movie, perhaps we'll see him do the same in Suicide Squad 2.

10. Deathstroke

Scott Eastwood playing Deathstroke in Suicide Squad?

Deathstroke aka Slade Wilson (not to be confused with Marvel's Deadpool aka Wade Wilson) is one of Batman's archenemies, having also been a member (and one-time potential successor) of the League of Assassins. While the bulk of Deathstroke's origin remained intact following The New 52 reboot, some aspects were changed and new facets were introduced. For instance, the character developed a new identity known as Deathstroke the Terminator, appropriately named for the many people he's hunted down and killed.

Wilson appeared as one of the original members of the revamped Task Force X in the relaunched New Suicide Squad, along with Joker's Daughter, Harley Quinn, and Black Manta. However, seeing as Deathstroke doesn't work well with others, he turned on his fellow squad mates in the series' second issue, which eventually ended with him leaving the team.

The squad is at its best when its rife with conflict, so Deathstroke could be introduced in the sequel either as a person who uses his superior tactical mind to manipulate the Squad into turning on each other, or even just as a character who threatens Deadshot or Rick Flag's position on the team.

Things are a bit too hunky-dory with the team right now. Deathstroke the Terminator would definitely mix things up.

9. Captain Cold

Captain Cold Legends of Tomorrow Poster

Batman currently has two adversaries (who are essentially the main characters) in the Suicide Squad, so why should Flash only have one? Captain Boomerang is, of course, a perennial enemy of the Scarlet Speedster, but he's certainly not the only villain from Central City to have been a member of Task Force X.

In the original Suicide Squad series (not counting the Silver Age Suicide Squad, which was a different beast altogether), Leonard Snart aka Captain Cold (a character who fans of The CW's Arrowverse -- namely The Flash and Legends of Tomorrow -- will undoubtedly recognize) was a member of the task force, and he made his debut appearance in Suicide Squad #16.

Following the death of Barry Allen in the massive crossover event Crisis on Infinite Earths, Captain Cold lost his drive to commit crime. After being captured by Manhunter, Snart was forced into service with the Suicide Squad. The Flash's cameo in Suicide Squad was one of the more intriguing parts of the movie, so maybe he'd be willing to make another cameo in Suicide Squad 2, bringing another member of his rogues gallery to justice.

8. Bronze Tiger

Bronze Tiger from DC Comics

Just like Deadshot, Ben Turner aka Bronze Tiger is a mainstay in the Suicide Squad comics, having been a member of several different incarnations over the years. And like Deadshot, Turner was once a full-on villain who later became more of an antihero, someone who Amanda Waller could recruit into joining the Suicide Squad out of his own volition instead of by indentured servitude (read: without a microchip bomb being injected into his neck).

In the comics, Col. Rick Flag eventually leaves the team due to concern over being corrupted by his villainous squad mates. When that happens, Bronze Tiger assumes Flag's position leading Task Force X, a position which he excels at. He often would be seen disobeying direct orders to save the lives of his teammates, despite their inherent nature of being expendable.

Whereas Flag was initially disposed to blowing off the heads of his squadmates, Bronze Tiger never felt that inclination. That would present an interesting dynamic between Amanda Waller and Bronze Tiger -- one person who sees the squad as nothing more than inconsequential criminals, and one person who sees them as humans, people worth saving.

7. Plastique

Plastique-Captain-Atom-DC-Comics

As with Bronze Tiger and Deadshot, Bette Sans Souci aka Plastique -- a separatist who once plotted to have Quebec secede from Canada -- has been a long-time member of Task Force X, having appeared in four of the nine incarnations, including the original series' run in the late '80s. Strangely, Plastique has a love-hate relationship with Captain Atom; she is both his adversary and love interest (and one-time wife).

Plastique's first encounter with Task Force X occurs in the first issue of Suicide Squad Vol. 1, an issue in which she is tasked by Amanda Waller to betray her fellow squadmates. Unfortunately, one of her teammates catches onto her plan and subdues her. Later, instead of killing her, Waller opted to brainwash her, removing her memories of her time with the Squad.

After becoming reformed and pardoned for her crimes, Plastique married the hyper-powerful Captain Atom. However, they would split up years later, and Plastique would go on to join Task Force X again in several incarnations leading up to The New 52 reboot. Of all the characters on this list, Plastique is one who has a high chance of not only appearing in a Suicide Squad sequel, but also being killed off relatively quickly. It isn't called Suicide Squad for nothing.

6. Lex Luthor

Jesse Eisenberg Lex Luthor Prison Batman v Superman

Jesse Eisenberg's casting and performance as Alexander Luthor Jr. (presumably the son of the iconic Lex Luthor we all know and love) was one of the most divisive factors of Zack Snyder's Batman v Superman: Dawn of Justice. At the end of the movie, as a result of him breeding the abomination Doomsday -- which attempted to kill the Man of Steel -- and possibly summoning the ancient being Steppenwolf, Luthor was arrested and imprisoned. In the R-rated Ultimate Edition of the movie, it is revealed that Batman arranged for Luthor to be transferred to Arkham Asylum.

While Luthor has never been a member of the Suicide Squad in the comics, the circumstances surrounding his imprisonment, as well as his relationship with Batman, could make him a viable candidate for a future Suicide Squad sequel. Who knows, perhaps instead of being a member, he'll become one of the squad's leaders, someone who would work behind-the-scenes instead of on the front-lines.

5. Oracle

Oracle Barbara Gordon Killing Joke Animated

We already know that Jason Todd is part of the DC Extended Universe, having been killed by The Joker (and Harley Quinn) ten years prior to the events of Batman v Superman: Dawn of Justice. While the studio confirmed Todd's death after Snyder's movie released, the only thing comic book fans needed to see was Todd's Robin suit on display in the Batcave.

Since Todd is part of this new expanded universe, which, in turn, means Dick Grayson aka Nightwing must be a part of it as well, it's possible Barbara Gordon is, too. After all, she exists in the comics in tandem with Grayson and Todd. Judging by a particular scene we see in Suicide Squad, The Joker's supposed origin story from Alan Moore and Brian Bolland's Batman: The Killing Joke could just be canon within this universe, thus meaning Barbara is no longer Batgirl (if she ever was).

If that's the case, then Suicide Squad 2 would be the perfect opportunity to have her debut as Oracle, the information gatherer/supplier and communications head of the DC Universe. After all, the character Oracle (who Barbara becomes after being paralyzed by The Joker) makes her debut in the Suicide Squad comics, offering information to Amanda Waller and her precious task force. Her inclusion would also be a smart way to set up the rumored Birds of Prey film, so take that for what it's worth.

4. Superwoman

Superwoman-Lois-Lane-DC-Comics

Comic book fans, as well as fans of DC Comics shows like The Flash and Legends of Tomorrow, understand the concept of alternate realities, parallel universes, and the multiverse -- and the idea that someone's doppelganger in one of these parallel Earths may, in fact, be a supervillain. We see this concept play out in the second season of The Flash, with characters like Cisco Ramon and Caitlin Snow having villainous counterparts on Earth-Two. So why should the DC Extended Universe be any different?

The inclusion of The Flash presents unexpected creative opportunities for Warner Bros., and the chance to include a character like Superwoman (or the rest of the Crime Syndicate) in a future Suicide Squad movie is too good to pass up. Although she has never been a member of the Squad in the comics, an evil, superpowered version of Lois Lane would make for an interesting dynamic. Additionally, including Superwoman would allow Amy Adams to expand her role as Lois Lane, perhaps beyond being a constant damsel in distress.

3. Count Vertigo

Count-Vertigo-DC-Comics

One of the universal highlights of Ayer's Suicide Squad was the dynamic between the Task Force's members, namely Deadshot and Harley Quinn. However, it can be said that Will Smith's Deadshot had a rather intriguing relationship with virtually all members of the squad, especially Col. Rick Flag. Therefore, it would be ideal to include another bad guy to the squad who could build off that compelling bond -- and the perfect candidate for the job would be the supervillain and Green Arrow arch-enemy, Count Vertigo.

Count Vertigo is a descendant of the royal family of Vlatvia. Unlike most members of the Suicide Squad, Count Vertigo isn't inherently evil, but rather, he fell into a life of crime following his attempt of recovering the jewels stolen from his lamented parents. Although he's appeared in several different versions of the Suicide Squad, the fundamental moment between him and Deadshot comes in the final pages of the squad's first volume, in which Vertigo asks Deadshot to kill him. Whether he does so or not is something you should find out for yourself -- and it's something that may or may not come to pass in a future Suicide Squad movie if Vertigo were to appear.

2. Shrapnel

Shrapnel-DC-Comics

Whereas most of the characters on this list have an ideal purpose for being on the Suicide Squad, Mark Scheffer aka Shrapnel is more of a wild card, having only appeared on the squad during the interim period between Suicide Squad Vol. 1 and Vol. 2. Shrapnel is by no means a supervillain within the DC Universe; however, his body being comprised entirely of metal plates, along with his ability to project those metal fragments, allows him to go up against some mighty foes.

Instead of being an adversary of the Justice League, or any of its individual members, Shrapnel is an enemy of the Outsiders, a group of misfit superhero metahumans, who came together under Batman's oversight to act as the first line of defense against superhuman threats to Earth. Interestingly, Tatsu Yamashiro aka Katana was once a member of the Outsiders, alongside characters such as Black Lightning, Arsenal, and Nightwing, among others. It would make for an interesting story for Waller to recruit Shrapnel and have Katana guard him -- which is something she seems to have no objection to in Ayer's movie.

1. Parasite

Parasite-DC-Comics

The purpose of Waller's Suicide Squad is to act as a last line of defense against the next Man of Steel, who may or may not share the U.S. government's values. Therefore, wouldn't it be great if her precious Task Force X consisted a characters capable enough (and willing) to fight the next Superman? The perfect character for the job, then, might be Rudy Jones aka Parasite, a former janitor at S.T.A.R. Labs who was exposed to particle radiation that imbued him with the ability to absorb the life energy of anyone he comes into contact with.

Like several other characters on this list, Parasite has been a member of the Suicide Squad in the past, having appeared sporadically throughout the years, from the squad's first volume all the way up to the New Suicide Squad incarnation -- which makes him an ideal candidate for a potential Suicide Squad sequel. Additionally, his ability to absorb Superman's life energy makes him valuable to the government, who may seek to control the Man of Steel should he ever come back when he comes back.

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Do you think we'll ultimately see a follow-up adventure from Task Force X? Who would you like to see join the team in the sequel? Let us know in the comments.

Suicide Squad is now in theaters, set to be followed by Wonder Woman on June 2, 2017; Justice League on November 17, 2017; Aquaman on July 27, 2018; an untitled DC Film on October 5, 2018; Shazam on April 5, 2019; Justice League 2 on June 14, 2019; an untitled DC film on November 1, 2019; Cyborg on April 3, 2020; and Green Lantern Corps on July 24, 2020. The Flash and Batman solo movies are currently without release dates.