Originally Posted by thestand
Michael C. Hall would be good. The thing about the Riddler is getting across the point on film that he is, without a doubt, no question about it, the most intelligent person that you will encounter in the movie. Ledger perfectly played the role of the guy that doesn't have sheer intelligence, but is so far outside the normal realm of thought that he can see patterns others can't, and that's why his portrayal was so good, while staying true to the comics. For The Riddler, if you're not going to go the cheesy Jim Carrey version (read: Nolan will stab himself in the throat before that happens), you have to go with someone who's so calculating and methodical and just absurdly intelligent, with a good dose of dark humor and sadism. So yeah, I like Michael C. Hall there.
See, the thing is, Joker WAS highly intelligent. Not as smart as Riddler, but no one is.
And frankly, the only way to stop Riddler in this if they used him, is if he stopped himself. He doesn't care about destruction or anything of that sort, he just wants to find out who Batman is. Sadly, he can't, because that's the biggest riddle of them all to him, and then he'd have nothing to live for.
Riddler's actually kind of a pointless villain when you get down to it, even if he is amazing.