A rumor running in Destructoid mentions Call of Duty producer Infinity Ward. They believe that the FPS experts may be working on a Call of Duty MMOFPS. The ideia of IW hiring MMO developers from Sony Online Entertainment is false - Massively was contacted by Alan "Brenlo" Crosby, Executive Producer for EverQuest II, to clarify this. He suggested that the rumor may have started since previous SOE Lead Developers Jon L. Davis and Rick Baker are actually working at Infinity Ward.

That being said, this could mean that the MMO rumor has something going for it. We'll have to wait and see.