There has been some interesting gossip concerning the new Batman sequel (post-Dark Knight). Rumor has it that Christopher Nolan is trying to get the following people to appear in the movie:
As The Riddler: Johnny Depp
As The Penguin: Phillip Seymour Hoffman
As The Catwoman: Angelina Jolie
I really like the Johnny Depp possibility. While he's not replacing Heath Ledger (it's not even the same character), it's going to take a major performance to reach the level that Heath Ledger did, and I think Johnny Depp is more than capable. Phillip Seymour Hoffman can play any role. And even though Michelle Pfeiffer was absolutely gorgeous as the "original" Catwoman, Angelina Jolie has that vampiness that's perfect for the role.