Rumors have been spreading that The Dark Knight Rises DVD would have and extra 30 minutes of footage including more details on Bane's origin story. Sadly those rumors are all false.
The Playlist is debunking those reports, based on sources close to the director. This shouldn't be that big of a surprise, since Nolan rarely shoots unused footage and has been quoted multiple times saying just that. It's expensive and a waste of everyone's time. And even when he has unused scenes, he chooses not to include them on his DVDs.
But we can't blame the fans. They (like us) just don't want the Nolan Batman legacy to end. We can only put our faith in Nolan and know that this was, most likely, for the best.