I personally blame Warner Bros. for the reason this teaser is a little lackluster. I manage at a movie theater and when we received this trailer on the hard drive, I was stoked. Then I had to wait for what seemed to be forever for the license keys to become unencrypted to watch it. Needless to say, I was just a bit disappointed when I saw it, but still excited nonetheless. My hunch is this: Warner Bros. hounded Nolan to release a teaser trailer in time for the release of their other MASSIVE film, Harry Potter and The Deathly Hallows Pt. 2. I can only imagine that Nolan is still editing the film/wrapping up the details, and prepping it for it's summer release. Therefore, he probably only had a little material to work with in order to develop a teaser. I'm happy he released it, and I"m happy to finally see Bane in all his glory, but I found the scenes from the previous films to water down the suspense of the finale.
And M4TTH3W, thanks for the translation! I knew the League Of Shadows/Assassins were going to make an appearence in this film along side Ra's Al Ghul (young and old) as in the comics, Bane & Al Ghul team up to take down Gotham City.