Call of Duty MMO a possibility?

It seems that Activision just can’t stop raping the Call of Duty franchise. If it wasn’t enough that there are countless Call of Duty games out there, Activision CEO Bobby Kotick recently said at a analyst meeting;
“[What] would be the natural evolution of a property like Call of Duty into a massively multiplayer environment — how do you monetize that?”
Activision then went and created a detailed survey for Call of Duty players, according to Destructoid, asking users various questions regarding a possible “enhanced service”, where players would pay a monthly fee for content such as “map packs” and “team management services”. You know, things that are usually free in all other games.