Re: The Dark Knight Rises
If Two-Face had been depicted as more of a split persona like in BTAS, I'd be more let down that his story was cut short in TDK, but Nolan's Two-Face is a one film character for the most part. There was no personality conflict, it was always the same Dent, just pushed over the edge by Rachel's loss and feeling that the incident was a sign that the only thing you could count on was chance so he turned to leaving all of his choices up to that. Something could be made of his crimes and the impact on Gotham if he'd lived and Batman didn't take the fall, but I don't know if there's enough to add a lot of substance to a second film with him in it. TDK successfully covered his story, if it's to follow the path Nolan went. While much different than Batman, I think it supports the Batman story to have Two-Face be such a mirror of Bruce's story, a good guy suffering a loss and having to makc a choice about how to deal with it, and Bruce and Two-Face going opposite directions.