The Inception Hypotheses seeks to explain the differences between the Plane Scene and Expanded Universe by proposing that both are different dreams.
The Plane Scene
In the first five minutes of TDKR, CIA is trying to find out Bane's secrets. He gets greedy, and questions Bane's hired guns before Pavel. The big guy takes the opportunity to humiliate the agent by giving him the kick.
The After-Plane Scene
In the rest of the movie, Bane is trying to find out business secrets by entering the mind of Patrick Bateman and Selina Kyle. Bane proves unprepared, as Bateman's mind invents a bat-like creature to fight Bane while they try to wake up. The movie ends with their escape and discovery of a common interest they are discussing, probably music.