How it must have been the trilogy "The Dark Knight?
Make no mistake, this trilogy is my favorite and I love each of the movies (especially the first two) but I think "The Dark Knight Rises" the last one of the trilogy, it should never exist. I mean is that the second, my favorite of the three, lacks some development. That's how I would put it:
Batman Begins:
This film remains intact because it is perfect (and the other is even more but we can make a perfect trilogy as I propose) would be best. That would improve if some plot holes and try not to waste the character of Rachel.
The Dark Knight Part I / The Dark Knight Part I:
It Would encompass from the start of it until the Joker escapes with Lau from prison. Rachel's character remains untapped we can try make it better because in the first part of the other she would die. Also we would try that both batman and gotham be something more darker like in "Batman Begins"
This should be the last scene of the movie.
The Dark Knight Part II / The Dark Knight Part II:
This film continues right where the first part left with the Joker escaping, why I want a sequel done? first because I found it unfair that so great and so well interpreted villain as Harvey Dent was only in the last 15 minutes. Here it would be longer, it would be even more Joker for this movie. We may also enter into the plot a small subplot where Batman is determined to retire. We can even add some of the characters that appear "The Dark Knight Rises" like John Daggett, the competitor of Bruce Wayne in Wayne Enterprises, Peter Foley a commissioner totally idiotic and cowardly and even John Blake, and if they want to do something with the mob or mafia we saw in the previous two films we could add to Nolan's world two characters like Rupert Thorne and Tony Zucco. The movie would begin when Batman and Gordon are going to save Rachel and Harvey and ends when Harvey Dent dies and Batman escape.