The Riddler can work in the Dark Knight style. Also, I really really really don't want Two-Face to be dead. That character, in it's new style, has WAY too much potential to be disregarded as an annoying side character, and be disposed off after a few scenes. Hopefully the new Batman movie will deal with a more personal battle Batman must face. Just watch the last few minutes of The Dark Knight, and you'll know why. And if ANY character can make a brilliant 'personal villain', so to speak, it's the new Two-Face. Batman is a vigilante, hunted down now (as you can see in the last few minutes of The Dark Knight), Two-Face could fit perfectly in that: a new villain is threatening Gotham, for example The Riddler. Now Two-Face would do anything to take revenge on Batman, so he'll work together with the new villain, trying to link the villains crimes to Batman, thus taking the police's attention off the villain and on Batman instead. So whilst Batman has to dodge the police, who are now hot on his heels, and while the whole city is starting to hate him, because they think he's attacking the city, he still has to stop Two-Face and his partner. That's fertile ground for a more personal Batman movie, if you ask me. Never gonna happen though.