Re: Who should be the villain in the sequel for Man of Steel?
Brainiac of course.
Preferably, with Lex (and not land swindler Lex ... FINALLY!) making his introduction, and establishing the rivalry/animosity he has with the Man of Steel. All leading into the third film.
"Option A: You talk, we listen, no pain. Option B: You don't talk, I remove your thumbs with my pliers, it will hurt. Option C: I like to vary the details a bit, but the punchline is ... you die."