One thing Blizzard knows how to do well, it's cinematics. Here's the opening cinematic to StarCraft II: Heart of the Swarm
. As you can tell, it focuses on the Zerg side of things and you can see a nice Zerg rush in all its glory. Really, Blizzard should have a team just make a few hour and a half movies with the way they handle cinematics.
Heart of the Swarm comes out March 12, 2013 for PC.