'World Of WarCraft: Cataclysm' Expansion Introducing Two New Races?

Rumors abound today as WoW.com is reporting that they have multiple sources claiming that the next "World of WarCraft" expansion will be called "Cataclysm." The expansion is also said to introduce two new playable races, the Worgen (pictured above, for the Alliance) and the Goblins (for the Horde).

Both races were recently discovered as Halloween masks in the game, which may point to them being playable, or maybe it's just Blizzard messing with people (as they've been known to do).

All questions should be revealed at the end of the month, when BlizzCon hits Anaheim and spills all its juicy innards. Personally I'm just hoping for a "Diablo 3" release date. And that it's in September.