Today, Blizzard released an interview with Dave Kosak and Roman Marotte, two of Blizzard's game designers, about their work in the cleft-in-twain Barrens of Cataclysm. Specifically, this interview deals with the Southern Barrens, which is almost completely redesigned from its vanilla counterpart. Taking place in the level 35 to 40 block in Kalimdor leveling, Southern Barrens should give both Alliance and Horde players plenty to talk about, according to Kosak and Marotte.
Cataclysm Preview - Southern Barrens
Q. What was the original concept for the zone?
A. The Barrens is one of the areas of Kalimdor hardest-hit by the Cataclysm. It has literally been ripped in two! The Northern Barrens retains much of the feel of the original zone and fulfills a similar gameplay purpose: it's primarily a training ground for low-level Horde characters. That gave us enormous freedom to create a whole new gameplay experience for the Southern Barrens. In the wake of the Cataclysm, the Alliance has been aggressively expanding into the heart of the continent from the east coast. As players enter the zone, they'll find that the Horde is really up against the ropes. The escalating conflict between the two rival factions is front and center here, providing a backdrop for much of the area's quests.
Those wanting more details about this new/old Cataclysm
zone can check out the full interview here