Which new heroes will be introduced to the MCU in the years after Avengers 4? Marvel announced their entire Phase 3 slate back in 2014, an unprecedented announcement that revealed an ambitious lineup including the likes of Black Panther and Doctor Strange. But the House of Ideas don't seem to be in a hurry to have a Phase 4 reveal, instead announcing films one at a time. That means audiences are currently hanging on Kevin Feige's every word.Although fans are excited about the prospect of the X-Men and the Fantastic Four joining the MCU, that's unlikely to happen anytime soon. In a recent statement, Feige insisted that his long-term plans aren't in any way complicated by Disney's proposed purchase of the bulk of Fox. In fact, his comments even implied that the X-Men and the Fantastic Four may not join the MCU during Phase 4 at all; they may both become Phase 5 properties.

Leaving aside the Fox lot, though, we can be sure that Marvel will continue to launch new franchises. Every year typically sees Marvel release two sequels and one franchise launch, and that formula has worked well for the House of Ideas. It's reasonable to assume that Marvel will continue to follow this pattern. If that is the case, the 2020 franchise launch is presumably the Black Widow solo film. Blacklist screenwriter Jac Schaeffer is currently working on a script. But what comes next? Well, Kevin Feige's given up a lot of information on the Avengers: Infinity War press tour...

  • Characters Marvel's Previously Teased And Are Finally Developing

Moon Knight

Unlike many upcoming characters not from the cosmic side, Marvel is finally considering introducing Moon Knight. The character is one of James Gunn's favorites, but Gunn has sadly admitted he just doesn't have the time. That doesn't mean Marvel aren't interested in running with the hero, though; Feige has officially confirmed that the studio has plans. Before you get too excited, though, he cautioned that could mean "five years from now, 10 years from now, 15 years from now."

Created by Doug Moench and Don Perlin, Moon Knight was originally a villain. Editors Marv Wolfman and Len Wein liked the character, and he was recast as a hero. Marc Spector was a mercenary who was exposed to the magic of the Egyptian Moon God, Khonshu. The vigilante is noted for his confused mental state, suffering from a version of multiple personality disorder that makes it difficult for Spector to discern reality from his own imagination. Many writers have used this as a storytelling tool, portraying the world through Spector's eyes so as to confuse readers too. He has superhuman strength, speed, and reflexes, but their level actually varies depending on the phases of the moon!

It's actually possible the MCU has already been dropping hints at Moon Knight. In Captain America: The Winter Soldier, Agent Sitwell mentioned that Hydra was targeting a man in Cairo. Curiously, Cairo was also marked on General Ross's map of Avengers incidents in Captain America: Civil War. Given Marvel were teasing Wakanda as far back as Iron Man 2, this may well be foreshadowing for Moon Knight.

Adam Warlock

Adam Warlock Soul Stone Powers

The post-credits scenes for Guardians of the Galaxy Vol. 2 revealed the Sovereign priestess, Ayesha, was creating a new being; one she named Adam. It was an obvious allusion to Adam Warlock, one of Marvel's most important - and most powerful - cosmic figures. A sort of cosmic Messiah, Warlock is strongly associated with the Infinity Stones. That led to a lot of speculation that Warlock would appear in Infinity War, but James Gunn has insisted he won't. "He will have a future in the MCU," Gunn promised, "but will it be in Infinity War? It will not." In fact, Gunn won't even guarantee that Warlock will appear in Guardians of the Galaxy Vol. 3. "Who knows how long it will take him to bake in that cocoon," he noted. "The time must be right."

That leaves Adam Warlock in a very strange place. Unlike the other names on this list, the seeds for Warlock's presence have already been sown. But will he appear in Guardians of the Galaxy Vol. 3, or could he potentially be the star of his own franchise? It's too soon to tell.

Eternals ikaris

The Eternals

It's an open secret that the post-Phase 3 MCU will be very cosmic in nature. The last month saw rumors that Marvel was working on an Eternals movie, and they've finally been confirmed by Feige himself. The Eternals are one of Marvel's many cosmic properties, an evolutionary offshoot of humanity created eons ago by the Celestials. Although the Eternals were originally conceived by Jack Kirby in 1976, their most well-known run was a 2006 relaunch written by Neil Gaiman and with art by John Romita, Jr. Things do sound to be in an early stage, though. "'Eternals is one of many, many, many things that we are actively beginning to have creative discussions about," Feige noted.

Read More: What's Marvel's Next All-New Team Movie?

The Eternals would be a perfect fit for the MCU. The Celestials are already an established part of the franchise, with a reinvented Ego playing a major part in Guardians of the Galaxy Vol. 2. They also have strong thematic ties to Thanos, who is an Eternal with the Deviant gene. It's true that this cosmic race are hardly well-known even among comic book fans, but Gaiman's series in particular is critically acclaimed. Besides, Marvel has already proved that they can make even the most obscure characters work on the big screen.

Nova

According to Feige, the superhero Nova is one character who has the "immediate potential" to join the MCU. The Nova Corps are an established part of the MCU, and they're likely to return in Avengers: Infinity War (they're currently the keepers of the Power Stone, which means Thanos will have to cut his way through their ranks).

In the comics, there have really been two prominent Novas; Richard Rider and Sam Alexander. Richard Rider is now an older, more established hero, who wound up on the front lines of galactic wars. Sam Alexander, on the other hand, is one of Marvel's current range of Legacy Heroes. Both wield the power of the Nova Force - and use it to devastating effect against their enemies. Rider is the one who's been name-dropped by James Gunn, but a film could conceivably include both versions.

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These are only the characters who have been mentioned recently, but they needn't be the limit. Even before the Fox purchase, Marvel Studios have the film rights to over 7,000 characters, and the fact they're actively discussing an Eternals movie gives a sense of just how deep Marvel are willing to dig into comic book lore. Avengers: Infinity War may be the culmination, but it's also just the beginning.

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