Season 1 of The Flash was full of fan service. The show fully embraced Barry Allen's (Grant Gustin) rich source material as it formed its own version of the Rogues, unleashed Reverse-Flash, delved deep into time travel, and even gave fans Gorilla Grodd - a villain who certainly isn't easy to use well in a live-action project. Not only was the show packed with Allen's memorable foes, but it also teased the existence of other heroes (e.g. the future newspaper mentions Wayne Tech) and started to explore the speed force.
Season 2 is already promising to offer even more fan service. Major characters like Jay Garrick and Zoom have been announced, and this season will introduce viewers to the multiverse. But before the second season of The Flash begins to air on The CW, the Blu-ray/DVD of Season 1 has revealed a fun easter egg that was left out - and it's a teaser that absolutely would have excited many DC fans.
Released via EW, the deleted scene has Barry Allen explaining to detective Joe West (Jesse L. Martin) why he's once again late for work. This time, Barry talks about how he was in Starling City - Oliver Queen/Green Arrow's home city, which will be called "Star City" in Arrow Season 4 - because there were reports of a man who can bend steel with his bare hands. This is, of course, a nod to Slade Wilson/Deathstroke (Manu Bennett) and his army of soldiers who have enhanced strength, courtesy of a serum called Mirakuru.
Barry did visit the city in the Arrow episode "The Scientist", in which the Arrow doesn't fare so well against a super-strong enemy named Cyrus Gold. Joe quickly dismisses the story, and follows up by pointing out that, last month, Barry was looking for "a man who can talk to fish" in Amnesty Bay. Even casual DC fans - people who may not know Arthur Curry/Aquaman grew up in Amnesty Bay - should be able to immediately recognize this as an overt Aquaman reference.
The CW's DC universe began as a place that was somewhat grounded in realism, but that has quickly changed. When people with superpowers first started showing up, it was just thanks to a serum which enhanced their physicality. Then the particle accelerator in Central City granted people unique superhuman abilities, and now the world has liquid which can rejuvenate (the Lazarus Pit), magic and mysticism (Constantine will soon make an appearance in Arrow), time travel, and even reincarnation (Hawkgirl and Hawkman are set for Legends of Tomorrow). Because of all that, it's easy to imagine Aquaman existing somewhere in the CW-verse as a superhuman character who has, so far, managed to avoid the spotlight.
It's fun to think about the CW-verse being populated with Aquaman and several other heroes on the Justice League (e.g. Superman, Batman, Wonder Woman). However, the King of Atlantis ever teaming up with Flash in a future episode really doesn't seem likely. Because of Warner Bros. and DC's movie plans - in what Zack Snyder has called the DC Extended Universe - it isn't probable that primary heroes in the upcoming films will pop up in the TV shows - and Aquaman definitely falls into that category since Jason Mamoa landed the role and he has a solo film coming in 2018.
If one of these characters does manage appear in a show, the odds of them playing a significant role now seems doubtful. After all, Arrow wanted to use Harley Quinn in its story, but because of David Ayer's Suicide Squad, the show limited her role to a very brief cameo. The same appears to hold true for Booster Gold in Legends of Tomorrow and John Stewart in Arrow. Still, the short conversation in the deleted scene is likely to make some fans smirk, even if they realize Aquaman will probably never join forces with Grant Gustin's version of the Scarlet Speedster. But hey, maybe the minds behind The Flash can find a loophole with the multiverse. Flashpoint Aquaman, anyone?
The Flash season 2 premieres on The CW on Tuesday, October 6 at 8pm/7 central; Arrow season 4 debuts Wednesday, October 7 at 8pm/7 central; Legends of Tomorrow begins in 2016. The Flash: The Complete First Season goes on sale September 22.