The Avengers was a long movie and many fans left the theater when the credits began to roll. Much to their dismay, however, it was later reported that there were two additional scenes at the end of the film. There was one scene mid-credits revealing a new threat to the superhero alliance, and there was another comical scene after the credits.
TDKR, however, offers no additional scenes after the film has ended, so once the credits start to roll, the complete story has been told.
Feel free to leave the theater and then go back to see the movie once again. There may be nothing after the credits, but there's always something to be gained from seeing a Christopher Nolan film more than once. Enjoy!