Warcraft's official YouTube account just put this up moments ago; it's the cinematic introduction to the Cataclysm expansion pack, due December 7, and it features one pissed-off, tormented dragon.
The video is 2:30 long. Not sure if this is the same thing that Blizzard said will be broadcast during the Cowboys-Vikings game currently in the first half. We're capturing video from that, and if it's dramatically different, we'll post.
Thanks to the sharp-eyed PhantomLink for the tip!