Pretty bad quality. But if you must then by all means press play. Otherwise wait for the proper one to appear online.

Warning spoilers ahead. So highlight below if you want to see the transcript of the trailer.

Bruce Wayne: I knew the mob wouldn't go down without a fight. Now this is different. They've crossed the line.

Alfred: You crossed the line first, sir. You hampered them (???). And in their desperation, they turned to a man they didn't fully understand.
Some men aren't looking for anything logical. They can't be bought, bullied, reasoned or negotiated with.
Some men just want to watch the world burn.

The Joker: Starting tonight: people will die. I'm a man of my word... [laughs]

Also a new viral site has pop up for TDK. WhySoSeries, pretty cool.