Which new villain is likely to appear in the sequel of Superman Returns?

Question

There's a rumor going around that this villain is going to be an alien. Any idea who?

Answer 1

doomsday would be really cool, but i don't think they would make it to where he die. would be a great movie!

maybe it might be brainiac? i can see that happening

Answer 2

How about Doomsday? So that way the movie will be entitled Superman Ends, and we'll be left wondering if the Man of Steel is actually going to die like the comic did.