Love Bane as a character, but for mine it is too early in the series for him. I understand that Nolan is leaving after this one, but someone else could continue with a similar tone, it is obviously more succesful than the previous attempts.
I would love to see them do Knightfall as it is written, but needs a few more villains under the belt first.
they should use Bane to full advantage and end with a genuine twist, go where the comics went. that would be cool.
note: if you don't want to know what the movie may or may not be about, best to just let that comment slide rather than researching it... unless you want potential spoilers i suppose. those familiar with Bane and his notoriety in the comics will know what i'm talking about, i'm sure.
but yeah... there are cool ways to end the trilogy with Bane involved, and staying somewhat faithful to the comics, but i doubt they will go there. they should, though.