The folks at MMO Champion have stumbled upon quite a bit of new information about Blizzard's unannounced World of Warcraft: Cataclysm expansion pack, including new class combinations, new zones and zone alterations, and more.
A cataclysmic event caused by Deathwing and Azshara will change the face of Azeroth as we know it. Most of the new content for Cataclysm will take the form of a revamped Azeroth, taking advantage of newer additions to WoW such as phasing and daily quests. Most of the quests and mobs in the classic zones will also be redesigned to make leveling less painful. With the revamp, a greater narritive and sense progression will be offered to players. Some zones and dungeons will change drastically to fit this, e.g.,
'¢ The Barrens will be split into two separate zones of two different level bands.
'¢ Azshara will become a low level (~10-20) zone.
'¢ Some of the zones like the Thousand Needles will be flooded.
'¢ Durotar is wrecked and apparently Orgrimmar could be destroyed. A new Orc city is rebuilt over the course of the expansion.
'¢ Gnomeregan will be part of the expansion as well and gnomes might be able to reclaim their capital. (The last part is still unconfirmed)
'¢ Wailing Caverns will be become a lush tropical area as a result of the druid's magic.
'¢ The Blackrock Spire will erupt and a new version of Blackrock Mountains will be available, apparently Ragnaros will be back too.
In the aftermath of the cataclysm, and the new conflicts on the horizon relief efforts can be found in many zones and new open PvP areas similar to Lake Wintergrasp.