Some more news on TDK from IGN:
At an edit bay visit for The Prestige, the upcoming thriller set in the world of turn-of-the-century magicians, we got a chance to ask Batman Begins helmer Christopher Nolan some questions about his upcoming Dark Knight project.
Speculation continues to circle about the sequel to Batman Begins. Heath Ledger has signed on to play The Joker, but other casting and story elements have been constantly in question, and various Hollywood personalities have been rumored to be involved. However, the air was cleared temporarily by Nolan.
The director had one comment for all of the questions asked, which included queries about Phillip Seymour Hoffman as Penguin, Ryan Phillipe's involvement in the project and Sean Penn's inclusion as Harvey Dent. The director simply said, "No truth to any such rumors. Always interesting ideas."
Nolan will begin work on The Dark Knight when The Prestige wraps. The film, which stars Batman actor Christian Bale, in addition to Hugh Jackman and Scarlett Johansson, is in its final stages of sound editing and will arrive in theaters October 20th. Stay tuned for to IGN for more details on both films, an in-depth look at the sound editing visit and an insightful Christopher Nolan interview, coming soon.