He can be a funny one that Christopher Nolan. When quite a few fans complained that some of Bane's dialogue was hard to make out in the IMAX prologue of The Dark Knight Rises which screened in front of Mission Impossible: Ghost Protocol, the director insisted no changes would be made. Well, as anyone who caught both the original prologue and then the one from the finished film can attest to, there were definitely alterations -- in fact, all but one of the villain's lines were re-dubbed. Have a listen..
Bane's voice comparison (IMAX prologue vs... by mrstevenrichter