Blizzard have unleashed the Barbarian on the Diablo III: Darkness Falls, Heroes Rise page. As with the Demon Hunter we get a short story, a spotlight video showcasing the Barbarian, a chance to win some cool prizes and the exclusive Class Sigil.
Mighty warriors whose strength and ferocity are a match for any foe, whether slavering beast or foul demon. Tall, broad, and rippling with muscle, the barbarian can bear a heavy weapon too large for a commoner to lift, or wield two full-sized armaments—one in each hand—with wickedly lethal purpose. In the wild and monstrous lands of Sanctuary, there is nothing more frightening than a barbarian with a dry blade.
The Barbarian got a background-building short story as well, which you can read here.