My favorite character joins the cast of the next Batman movie and even though I'm not a Heath Ledger fan, I'm going to have to trust Christopher Nolan on this one.... heck he nailed casting Christian Bale, and Bale would have never been my first choice... though I love him in that role now.

Lets just hope that Hollywood doesn't think that Star Power isn't what drove Batman Begins.
The Story and the Characters will always make or break a Batman movie.