A friend of mine came from the premiere screening of HP7 in England and told me what is in the teaser.
1.It's the same as the TDK teaser Trailer, with a bit of footage.
2.Bane says ''I've nothing to lose...Gotham will fall and so with it he'll come and then I'll break him...I will break batman!
3. ''But the storm is coming...and fire rising'' is mentioned by Alfred
You can promise me on this one, my friend is actually a journalist and saw it at the HP7 showing. Well to me it sounds great, Bane doesn't sound as interesting as The Joker though.