StarCraft II: Heart of the Swarm BlizzCon 2011 Preview Trailer

A new teaser cinematic of footage rendered entirely within the StarCraft II game engine (2:26)
At BlizzCon 2011, Blizzard Entertainment has released a new video for Heart of the Swarm showcasing the first StarCraft II expansion which will be available for PC and Mac. StarCraft II: Heart of the Swarm will offer additional units and multiplayer changes from Wings of Liberty, as well as a continuing campaign focusing on the Zerg species.