A tipster over at WoW.com sent in this link from Zakk Wylde's Twitter account, insinuating that Ozzy Osbourne might be making a musical appearance at BlizzCon 2009 this August. "I'm doing Blizzcon with him in August and supposed to finish up the cd in September," Wylde writes in his Twitter post, referring to Osbourne. "This is news to me."

Granted, it's just a Twitter post (from Zakk Wylde, no less). But throughout the last year we've begun to see lots of rumors leak out via Twitter before any other news outlet, many of which have been true. The rumor comes shortly after WoW.com confirmed from an unknown source that veteran BlizzCon host and actor Jay Mohr will be returning to host this year's BlizzCon.