This movie is going to rock, no doubt. Nolan is very talented and has a good sense of storytelling. I think TDKR will give us possibly the first satisfying conclusion to a superhero saga in a quite awhile.
So many trilogies seem to end with disappointment. Indiana Jones and the Last Crusade, Return of the King, and The Bourne Ultimatum are a couple of strong finishes I can think of. I still think ROTJ, despite its flaws, is a very solid movie but I know there are people who don't like it.
Godfather 3, Spider-Man 3, The Matrix Revolutions, X-Men 3, and others left people disappointed. If you look purely at the superhero genre, there hasn't been a single well-concluded trilogy. TDKR will give us that and hopefully culminate the superhero era which I have enjoyed but has long run its course.
On the other hand, The Avengers and The Amazing Spider-Man look terrible. Man of Steel could be interesting with Nolan producing.