Blizzard has yet to state when the StarCraft 2 trilogy will begin making its way to stores, though each release may be years apart. The first of the three releases, Terrans: Wings of Liberty, will feature the main Terran campaign and a Protoss mini-campaign.
The second release, Zerg: Heart of the Swarm will pack some RPG elements, with the third entry, Protoss: Legacy of the Void, including a bit of diplomatic gameplay.
RTS screenshots are useless. You can't tell anything about the game. It just looks like a mess.
Release more gameplay videos from dreamhack :(