A new Terran unit was presented on Blizzard's Facebook photo album today.
As previously reported, the Zerg-focused Heart of the Swarm expansion will change the multiplayer side of StarCraft 2. Earlier today, a new Terran unit in silhouette was released on Blizzard's Facebook.
Blizzard has confirmed that the unit in the teaser image is planned to be a new multiplayer unit.
Blizzard has planned to continue teasing us with new units for the Zerg and Protoss on its Facebook page, unveiling "the rest of the new Heart of the Swarm multiplayer units and abilities" at BlizzCon according to Kotaku.com.
Links
Kotaku.com - Source
Battle.net - Source