You know who would make a great Lex Luthor? Christoph Waltz. He could really play a tough guy. Here's hoping that in "Man of Steel", Lex isn't lusting after Lois to marry her, but maybe to kill her.
http://www.imdb.com/name/nm0910607 If he can be a lion tamer in "Water for Elephants", not to mention a mean Nazi in "Inglorious Bastards", he'd be able to take on the "Man of Steel."
Artemis