Blizzard have released a new trailer for Heart of the Swarm, the second part of the Starcraft II trilogy. The game is set to include a new campaign from the viewpoint of the Zerg, a parasitic race who seem hellbent on dominating other worlds and their inhabitants.
The trailer gives us a glimpse into some of the missions that the Zerg will face including the involvement of the Queen of Blades in combat. Though she may not be as powerful as when we last saw her in Wings of Liberty where she was able to destroy buildings with her mind. Other details include the Zerg evolution screens, similar to the upgrading system in Wings of Liberty, players will be able to 'evolve' their Zerg troops with different abilities as the campaign progresses.
Starcraft II: Heart of the Swarm has no release date of yet but is expected in 2012, this is not confirmation.