The latest WOW expansion–Wrath of the Lich King–did not add any new races, its ancestor, The Burning Crusade, added the Blood Elves and Draenei when it was published in January 2007. The latter had been known about since December 2005, when an advance edition of Computer Games Magazine revealed the new Alliance race.
The rumor comes 10 days before BlizzCon 2009, which runs from August 21-22. The developer has traditionally used the convention to officially announce new titles, including both world of warcraft games and wow expansions. The Burning Crusade was unpublished at BlizzCon 2005, and Wrath of the Lich King was unveiled at the event two years later.
The official story: “We haven’t made any attentions with regard to any new races for World of Warcraft and don’t comment on rumors or speculation.” — Blizzard rep
WOW accurately predicted the previous two add-on races, the Blood Elves and Draenei, well before their official revelation by Blizzard. However, WOW had reported based off exposed sources and cited detail game data to back up its claims, such as screenshots, audio files, and video clips. The site’s new blog post, on the other hand, only goes off anonymous sources and dubious novelty-mask image files. But with BlizzCon right around the corner, the veracity of World of Warcraft sources will soon become clear.