fridgezombies:

http://us.battle.net/sc2/en/media/videos/?view&keywords=heart-of-the-swarm#/heart-of-the-swarm-trailer

Some of the actual CGI clips they throw in there are absolutely beautiful, typical of blizzard :) 

Blizzard’s cinematic team is awesome.  I’m quite looking forward to this expansion and some of the new units / abilities look quite awesome.