SGDOVAHKIIN

Kotaku.com states-

Thanks to last week's trailer, we already know that the next DLC for Bethesda's hit action/RPG will be pitting players against the first humanoid to wield dragon powers. And now we know where Dragonborn's battles will be happening.

New screenshots and details from the publisher reveal that your Dovahkiin will indeed be making a rumored return to Morrowind, site of the third Elder Scrolls game. From Bethesda:

Journey off the coast of Morrowind, to the island of Solstheim. Encounter new towns, dungeons, and quests, as you traverse the ash wastes and glacial valleys of this new land. Become more powerful with shouts that bend the will of your enemies and even tame dragons. Your fate, and the fate of Solstheim, hangs in the balance as you face off against your deadliest adversary—the first Dragonborn.

Bethesda stated that the Dragonborn DLC will be available on December 4 for Xbox 360 for 1600 microsoft points (20$). Release dates for PC and PS3 are still unknown...