Just seen it, it was incredible, what a final role for Ledger. Phenomenal performance, genuinely disturbing and kind of how I always saw the Joker. Little hint dropped by Fox suggests Catwoman might make an appearance in the next one, which could be interesting. I know there were rumours that Philip Seymour Hoffman might play the Penguin at some point, no idea if there is any meat to that. Riddler shouldn't be next, would be too much like they are remaking the previous series, and their are better, less campy villians to utilize. problem is, some of them are a tad on the unbelievable side. Liked Scarecrow's little cameo too.