[VonDada]

I think the Riddler is a great next villian because in the ultra-realistic world of Gotham it would make sense for the Riddler to be a kind of "copycat Joker" now that The Joker is in Arkham Asylum.

I think the Penguin doesn't really work. I think that Phillip Seymour Hoffman would make a great Batman villian, and the Penguin would be a good choice, but I don't think the Penguin can hold a movie.

Unless they do something brand-new and crazy with him.

Catwoman would rock. I suggest either Angelina Jolie or Jessica Alba.

I'm pretty sure that Harvey Dent is dead. Wasn't he eulogized in the end of the movie? Unless they revived him and then locked him up in Arkham, which is not really plausable.