No but I can guarentee you that if there is a Joker in another Batman movie (I haven't seen this one), then he'll be portrayed by some actor with a similar story to Ledger.
I mean similar as in a mediocre rise to fame. Like the three guys who're gonna play Ledger's role of Tony in that movie Ledger didn't finish, I think they're Depp, Jude Law, and Brad Pitt? They'll use someone of similar life.
And wtf are you guys so obsessed with Batman for, wow Hollywood's really got a spell on you doesn't it?
Yeah but it's easy to replace a no talent hack like Katie Holmes. Not so easy to replace someone who quite possibly turned in the best performance ever in a comic related film.
I mean, if we can have Michael Keaten, Val Kilmer.. and the other one.. (I'm not going to name him because he may have killed the series for this long) in movies so close together.