I doubt Dent's dead. This film was Two-Face's origin story, and he too is a canonical villain.

Batman Begins was superb. The gulf between that and this is huge.

Memento, which I watched twice for a class at my Shul on the subject of faith, left me with the impression that the protagonist, with very good reason, set himself up to be set up to kill his antagonist. I found it satisfying; the protagonist killed someone who was cynically using him as a killing machine.

TDK did not give me that satisfaction - call me shallow, but I want catharsis. Memento gave it (though it does demand two viewings) TDK did not.