TwoCredits

"So you want me to announce the game before our announcement?" he told GamesIndustry. "No offense, but I think there's like 300 people here, and I'll be ripped apart by 8000 people [at the Invitational] if I pre-announce it—but it's going to be really exciting. I think everybody here will be really excited about the announcement."

Moreover, Diablo fan website DiabloII.net reports that Blizzard's game announcement will be Diablo III, the long-awaited next title in Blizzard's hack-and-slash RPG series.