Bruce Wayne is pretty cardboard in the comics. He's managed to go for over 70 years with nothing much notable happening in his personal life, at least Clark Kent has a regular love interest.
Well, it always depends on the individual writers, doesn't it? Still, yeah, he usually is. The thing with Nolan's film is that Batman is also carboard - I felt like both were pretty much blanks in Dark Knight. The interesting characters in the film were The Joker and Dent. I suppose that is the curse of second Batman movies, that they're carried by the villains, but still... I love Batman as a character (mainly, admittedly, when he's played as slightly psychotic, but then again he's a millionaire dressing up as a bat to fight crime, so in a realistic setting, I don't see how you get away with that without some serious mental damage), but in the movies, he's seldomly been more than a cypher.
I expect the same of this movie - Catwoman and Gordon (and I expect Gordon-Levitt's character) and above all Bane will be the interesting characters, and Batman will just prance around hitting people.