Watch StarCraft II: Heart of the Swarm's intro

Blizzard's shock-and-awe campaign for StarCraft II: Heart of the Swarm goes off with a bang in its newly revealed intro cinematic. Zerg armies lay siege to Terran dominion troops, and Blizzard hopes we begin to wonder: "Who is Sarah Kerrigan?" The answer to that question will arrive with the zerg-centric installment of the heavyweight real-time strategy series on March 12 . Until then, we hope Her