The league of shadows, the Joker's plans, the pit, almost everything in Nolan's films is realistic comic book-y. For me, it feels like everything belongs in that world.
I love Nolan. I love all of his films. I'm always excited about what he's doing, but I can't think of his movies as more than entertainment. He isn't subtle. I don't feel like he's trying to tell me something. I don't have much of an emotional response while watching his movies, The Prestige being the only exception. So yep, pure entertainment, and I loved TDKR, maybe a little bit more than TDK and BB, but please don't compare Nolan with brainless, disposable entertainment like The Avengers.