I remember that Joker got arrested alive, but he might return in the future batman/dark knight movies. But we still need to find a new actor to play the Joker.

In the meantime, the Riddler might join in to team up with the Joker to fight against the Batman.

Would actor Seth Rogen be a perfect fit to play the Riddler?

The Riddler has always been one of my favorite Batman characters along with The Joker, Poison Ivy & Catwoman i'd definetly love to see The Riddler appear in a future Batman film, who would play him however is another challenge

David Tennant would be perfect as The Riddler. People have already photoshopped him as the character and he does resemble how he was drawn in one of the comics. It doesn't hurt that he's a good actor either.

http://www.minecraftforum.net/uploads/profile/photo-1377620.jpg?_r=0
http://images2.wikia.nocookie.net/__cb20090501191661/batman/images/6/60/Riddler_009.jpg

Would actor Seth Rogen be a perfect fit to play the Riddler?
Heck NO he'd ruin the movie. He was a lousy Green Hornet.

Who will play the Joker on return?

Is anybody familiar with actor Adam Pally? If not, I may have no choice but to try him out to play the Joker villain well.