Casting rumors for the next Christopher Nolan-directed Batman have run rampant ever since The Dark Knight opened, with one of the most persistent being Johnny Depp as the Riddler. Michael Caine spoke to MTV recently, where he confirmed the rumor.
Even with Depp recently /johnny-depp-comments-on-riddler-rumors-for-the-dark-knight-sequel/being non-committal about the role, Caine still says that Depp is a lock for the Riddler, and Philip Seymour Hoffman will be the Penguin.
I was with [a Warner Bros.] executive and I said, 'Are we going to make another one?' They said yeah. I said, 'How the hell are we going to top Heath? And he says 'I'll tell you how you top Heath - Johnny Depp as The Riddler and Philip Seymour Hoffman as The Penguin.' I said, 'S-t, they've done it again!'" [Laughs]
So, while this still isn't a confirmed casting announcement, it certainly seems to add weight to the rumor.
Meanwhile, when asked if he had seen a script yet, Caine responded "No. He's gone. He'll come back with a script sometime."