Blizzard plans to show off the single-player side of StarCraft II: Heart of the Swarm for the first time next month, offering an early look at the first expansion for and follow-up to StarCraft II: Wings of Liberty.
We received an invite to see Heart of the Swarm earlier today, promising that we'd see a small portion of the game's campaign, but warning that we won't see any changes or additions to the multiplayer side of StarCraft II at this stage.
Blizzard has indicated that it plans a different approach for the first StarCraft II expansion, one that focuses on Sarah Kerrigan and the Zerg legions for its campaign. It's expected that Heart of the Swarm will include some RPG-like mechanics and perhaps include new Zerg units.
Just because Blizzard is planning to show off Heart of the Swarm next month doesn't necessarily mean it's due this year. Blizzard has indicated that we will likely see the next StarCraft II game in early 2012. Note that we got our first look at the StarCraft II: Wings of Liberty campaign nearly a year in advance of the game's release.