Blizzard Entertainment has revealed the opening cinematic for StarCraft II: Heart of the Swarm! StarCraft II: Heart of the Swarm is an upcoming expansion pack for the military science fiction real-time strategy game StarCraft II: Wings of Liberty and part two of the planned "StarCraft II" trilogy. Part three is titled "Legacy of the Void." "Heart of the Swarm" is described as follows:

The Queen of Blades is gone. On the hellish planet Char, Jim Raynor harnessed the power of an ancient Xel’Naga artifact in a desperate bid to stop the zerg Swarm from overrunning the Koprulu sector, and the artifact restored Sarah Kerrigan to her human form. Without their queen to guide and unify them, the Swarm has fractured into several broods scattered throughout the Koprulu sector. One of the greatest threats to the galaxy has been neutralized... or so it seems.

Sarah Kerrigan is on the loose. Even without the terrible powers of the Queen of Blades or the might of the Swarm at her command, the former Ghost remains a foe not to be taken lightly. But if the artifact really did set her free, then why is Kerrigan seeking out zerg broods scattered throughout the Koprulu sector? What happened to Jim Raynor? Is she still pursuing her quest for vengeance, or has her transformation given Kerrigan a new purpose? Who is Sarah Kerrigan?

"Heart of the Swarm" will be available on March 12.