According to an interview posted in The Herald Sun, Hugh Jackman denies all rumors that he has a connection to the upcoming The Dark Knight, especially for playing Harvey Dent, even though he has expressed an interest before. Here's what he said in the interview:

Your name has been mentioned in connection with quite a few comic-book films. You were up for Superman weren't you?

Not at all.

What about Batman?

Same thing. I think because I'd worked with Chris Nolan, I think it was just fanboy stuff.

So here you go, folks. One candidate is down. Who's next?