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Does Justice League Have A Secret Superhero?

It doesn't take a diabolical genius like Lex Luthor to do this math.

During San Diego Comic-Con, Warner Bros. unveiled the trailer for the upcoming Justice League movie along with details about the six members of the squad. But shouldn't there be seven?

We know about Superman (Henry Cavill), Batman (Ben Affleck), Wonder Woman (Gal Gadot), Aquaman (Jason Momoa), the Flash (Ezra Miller) and Cyborg (Ray Fisher), but Digital Spy points out that Justice League traditionally had seven members in the comics, and a teaser image from 2015 shows Aquaman along with the phrase: "Unite the Seven."

One theory is that the seven actually refers to the Seven Seas of Aquaman's kingdom, but there's also a chance the seventh member of Justice League has yet to be revealed. Digital Spy took a few guesses at a potentially secret seventh superhero including Martian Manhunter (a founding member of Justice League in the comics), Shazam (who has a solo film coming in 2019) or Green Arrow (Scott Eastwood's rumored character in Suicide Squad.

Check out footage from Comic-Con above and see if you catch any clues.