New Terran units have been spotted in leaked scans from a Swedish gaming magazine, Super Play. The new units have already been confirmed by Karune on the Battle.net forums (scroll down). We have the scans and the translations:
Marine:

It wouldn’t be StarCraft without them. They are the backbone of the Terran army, after all.


Planetary Fortress:

The Terran HQ can be upgraded to a Planetary Fortress. It’s a HQ with a large defensive weapon on top.





The biggest new boy is called Thor, named after the Thunder God. A guy like this can take down an enemy base on its own.




With this building, the Terran can see enemy units on the map, even if they are moving in undiscovered territory.



We’ve already seen the Sensor Dome in a screenshot from the game (click for big):










Viking Fighter:

Say hello to the Terran’s own Transformer. The Viking can transform from an air fighter to a mech. Convenient if you’re flying and you run into anti-air defenses.

Supply Depot:
New in the Terran base is a building that can pack itself up and submerge below the surface so that your units may pass over it. It works well as a first line of defense in the early stages of the game.


Nothing new in this section. Note the new weapon of the Dark Templar:


That’s it for now. We hope to hear more about these units from Blizzard themselves soon, and see some in-game action!


From the Starcraft 2 Blog.

Am I the only one who's excited about the prospect of an attacking Planetary Fortress?
Run out of minerals in your main? Lift up the HQ and go help in the siege, while building SCVs to repair your units.

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Judicator Zetaras Xal'Kurat
Twilight Arbiter
TerranoZergus Project