Starcraft 2 is in process, so it's extremely unlikely that Blizzard would dilute that audience by announcing a Starcraft MMO. Ditto with a Diablo MMO, and we don't even know what its release date might be. World of Warcraft has Wrath of the Lich King coming (probably) next year. Can we assume that the next announcement will concern their "next-gen MMO"? Is that project the oft-mentioned "Hydra"? With two active fantasy titles and one science fiction game, what could the next big thing possibly be?