Per ora solo un rumor da Gamespy...Getting back to Activision/Blizzard, an announcement will be made at E3 that Infinity Ward has been tapped to develop StarCraft Ghost for the 360, PS3 and PC. The twist will be that there will be a persistent online world component that players can enter for a monthly fee, effectively making an MMO StarCraft game similar in some respects to PlanetSide only much, much better.
http://mostwanted.gamespy.com/2008/51.html