It's a pretty good cinematic. It looks like Thrall is coming back to the Horde.
I really wonder what Blizzard is planning for Sylvanas. They said she won't be Garrosh 2.0, but she's sure looking like it. I also don't think they're handling her character very well. She's supposed to be the cool-headed, competent archetype, but she seems to be making rash and foolish decisions all through this expansion.
Ah well, we'll see how this turns out in the patch.