StarCraft II: Heart of the Swarm opening cinematic trailer

Available in stores and online on March 12th, Heart of the Swarm, the first expansion pack for StarCraft 2, features a new campaign continuing the story of Sarah Kerrigan, Queen of Blades, as she plots her revenge against the dictator of the Koprulu sector, Arcturus Mengsk. It also introduces several new multiplayer units and new features which enhance StarCraft 2's online mode.