This was on Superherohype about Batman: The Dark Knight:
"About.com talked to Aaron Eckhart at the 300 premiere and he was asked about playing Harvey Dent/Two-Face in The Dark Knight. Here's a clip:
Is the opportunity to work with Christopher Nolan what appeals to you about working on The Dark Knight? Is that the reason you signed on?
"It's certainly one of them. It's a huge, huge, deal. I love his work. I think he and his brother just wrote a firecracker of a script. And the cast - everything is first-class. The series, I'm looking forward to working on. Batman Begins, everything is just top notch."
As well as this:
"Cillian Murphy talked to ComingSoon.net and did not confirm or deny that his Batman Begins character, Scarecrow, might be back for The Dark Knight.
And for those still wondering whether Murphy might return as Dr, Jonathan Crane AKA The Scarecorew in Christopher Nolan's Batman sequel The Dark Knight, the actor still is hesitant to talk about it. "I'm not at liberty and it's not my place to say," he repeated from other recent interviews. "I'd love to work with Chris again. I enjoyed tremendously working on that film, and we'll see. I think casting Heath Ledger as the Joker is fantastic casting. He'll make an amazing movie."