(although I understood him in trailer #2 as well, but I DID have a hard time understanding him in that five-minute intro plane scene.)
Well yeah that was
1. A bootleg version of the opening scene/prologue
2. Bane's voice in the prologue was the 2nd time we heard him. Before that, Nolan had no idea that the voice was at times hard to understand.
BTW the first time people heard bane was at the Heinz Stadium shoot
You could call this "Bane 1.0"