The internet is abuzz with rumors! First off, it appears to be a catwalk, in an enclosed, cemented area, possibly underground. So, theories are its the Batcave. If it is the batcave, the person in the back could be very important. Also, the face is completely obscured. NOLAN IS JUST ****ING WITH ME.
I like how Bats always has hands already in his suits, so he doesn't have to use his own. Also, it's cool that when he hangs his suits up, he stretches out the arms!
So remember that early scene in The Dark Knight, with the Batman impersonators? They're making a game based on those guys. It's a class-based shooter in which Joker and Batman wannabes duke it out.