"When you think about other properties that we own and control like Call of Duty, and what would be the natural evolution of a property like Call of Duty into a massively multiplayer environment...how do you monetize that," Kotick pondered, reports GameSpot.

In a conference call last year, Kotick made similar comments regarding a possible Guitar Hero MMO. "When we look at all the prioritization of opportunity we need to do, clearly, those are things that fall into the realm of opportunity for us for the future," he said.