The next WoW expansion rumors are being confirmed on WoW.com in this article:

WoW.com has learned through multiple sources close to the situation some details on the next expansion, to be called World of Warcraft: Cataclysm.

As we're getting into the season of news and information, all major leaks and spoilers will be happening after the break. If you don't want your surprises ruined for you, don't read this post. If you want to know, click after the break and enjoy. This policy worked well for us during the testing phase of Wrath of the Lich King and we're pleased to continue it now.

After the break, the new playable races of Cataclysm.

Our sources have told us that the new races of Cataclysm will be:

- Worgen – Alliance
- Goblin – Horde

This information has been speculated upon by multiple places, and we're pleased that everyone's speculation has turned out to be more or less true.

You can find out more information about the Goblins and Worgen from WoWWiki, as well as from previous articles we've written.