I enjoy reading all these theories; speculating about these films is the most fun part of the wait and the reason why I joined this board in the first place. It's been a long time since the threads have been this lively, and it feels good!
Now, regarding everything that has been said in the last few pages, a lot of it seems interesting to me and probably on the right track, but I wonder... If we can assume that Bruce Wayne will appear a little more and that the film will probably explore his family's past further, in a story involving mainly corrupt institutions and/or the Dent family, where does Batman really fit in?
What I mean is that if a comic book like Year One can do without a colourful villain, this is a big Hollywood production: I can't imagine them doing without one for a multitude of reasons. Just as The Batman had some spectacular murders committed by the Riddler, this film needs an eccentric character to put on a show.
Assuming Harvey won't transform until at least the second half of the film, either a villain has yet to be announced, or maybe Dent Sr. or Gilda are also someone else...
No?