The thing is is that I believe the Dark Knight is the Empire Strikes Back of this series. I just don't see how he can top it. I think the rivalry between Batman and the Joker and their battle for the hearts and minds of the Gothamites as well as the fall of Harvey Dent and the role the Joker played in that is what made this movie dynamic and organic the great performances aside. I don't know if Nolan can tell a better story the next time around and the Joker was really such a big part IMO of this movie being so amazing. The villains in BB were kind of bland and I think that's another reason why it never did a ton for me...I just don't think that there is going to be another villain in this series more compelling than Ledger's Joker.