Well here is our first Dark Knight poster, it appears that they are really counting on the Joker to be the big pull for this film. Also if you haven't been there, go check out the Jokers website Why So Serious

Oh and I found this bit from a few weeks back from IGN, now you read it and tell me if this doesn't sound like Jack had had a few too many and gave an interview.

From IGN.com

Hong Kong residents aren't the only ones not too keen on The Dark Knight, which co-stars Heath Ledger as the Joker. Oscar winner Jack Nicholson, who played the Joker in Tim Burton's 1989 blockbuster Batman, expressed his disappointment about the film to MTV.com. "They never asked me about a sequel with the Joker. I know how to do that! Nobody ever asked me," Nicholson said. "It's like, in any area, you can't believe the reasons things do or don't happen. Not asking me how to do the sequel is that kind of thing. Maybe it's not a mistake. Maybe it was the right thing, but to be candid, I'm furious."