WoW in Space".
This isn't shocking news, however, as Bungie in the last year has peppered clues to their next game on a regular basis. Last October, Bungie creative director Joe Staten "Wouldn't it be great if we could make a world that was always there for you? Wow. That would be great," while a few weeks ago an alleged contractor Bungie was working on an MMOFPS called "Destiny".
Activision will be publishing the game, of course, with Bungie in the middle of a 10 year contract with the publisher.