Maaan.... here is an excerpt from an interview with Heath Ledger regarding his upcoming role as The Joker in The Dark Knight (Batman Begins 2):
DRE: Have you read many Batman comics?
HL: No and I think that’s kind of helping me a little bit. I was never really a fan of comic books or comic book movies. I never despised them but I was never one to read them. I never sought out the films but I would sit down and enjoy them. So because of that I really feel that I’m not carrying much pressure.