I vote for Bane. Banes story was great and Batman and Bane never really meet until there confrontation after Batman has had to deal with all the escaped nuts from Arkham.
Spoiler (Highlight or Triple Click to Read):| I think the ending of the 3rd movie in this trilogy would be the image of Batman being lifted over Banes head and the having his back broken. |
Bane, in the comics anyway, was intelligent, calculating and knew exactly what he wanted. I think Bane is the least cartoony of Batmans foes and could be a great ending to this set of films.
Bane (comics - Wikipedia, the free encyclopedia) Spoilers of the Knightfall storyline for those unknowing.