Well, it seems that Blizzard has unveiled some of the new Terran units in StarCraft 2. Well, 2 new units in StarCraft 2, and 2 old ones making thier come back (Marine and Ghost). Check them out here.
Note the new Terran Viking, the sole reason I'm starting this thread. The Viking is, in fact a Transformer, being able to convert between a support walker and an aerial fighter unit.
Also, among the Viking's response dialogue is "Transform, and roll out!" Ironically, the Viking does not possess a "rolling" form. If you want to endure watching a campaign demo, you can hear the quote from the Vikings once you get to in game (Which I admit, takes a while.)
I apologize if this has already been posted somewhere else.