Had he been given an opportunity to move forward with another Superman movie starring Henry Cavill, director Zack Snyder revealed in a new interview that Brainiac would have been a possible villain for the next movie.
“We talked about a Brainiac movie,” said Snyder. “But I do think that the Kryptonians that are in the Phantom Zone are probably still around. And there was always a possibility for their return. Faora and whoever’s left. That was a thing that was always out there that we talked about as a possible sequel. I just think it’s best to give Superman these extaterrestrial challenges because I think you’ve got to be careful with — other than Lex Luthor, because, of course, you have to continue with Lex, because Lex is his real nemesis — but I think you really have to look outside of the Earth for challenges for him because of how powerful he is.”
Snyder explains that he loved working with Henry Cavill and would have continued to build the character of Superman in the direction already set in the first film.
“I don’t know that I would’ve taken him in a different direction than the direction I was taking him. I think Henry is a great Superman. I have a great time working with Henry, and I think that also, we endeavored to make him in Man of Steel, sort of a modern Superman in that, in his relationship to society and/or the modern world, we did that now, and like, what would happen if… And it’s kind of what the movie is about, frankly. Man of Steel‘s about, what if we really had a Superman? What would it mean? You know?”