Blizzard Entertainment will at last unleash the Heart of the Swarm expansion for StarCraft 2 on March 12, 2013, and the developer has released the expansion pack's intro video to get you in the mood (via All Games Beta). The video sets the stage for the expansion's added story content, with players watching events unfold from the perspective of Sarah Kerrigan.
Geek alert: if you listen really carefully to the intro vid, you'll hear a slightly truncated Wilhelm scream.
In addition to expanding on the story, Heart of the Swarm also bulks up StarCraft 2's multiplayer potential with seven new units injected into the carefully balanced proceedings. Some of the older units will be updated as well. The release isn't all that far away anymore, so watch the video and start planning your strategies.