Perhaps not MMO-like as rumors have been floating around, but perhaps pay a monthly fee to play this as a 32v32 multiplayer game or whatever? Or that's what Bobby "I eat babies" Kotick seems to be implying.
He also wants less [Insert noun here] Hero games, which is a good thing.

Why don't that cretin just make people pay per every bullet/grenade/whatever, even in singleplayer?

Where did you get that?
From what I've heared so far, which are mostly rumours, you have to buy the game (paying for single play) and pay a monthly fee for multiplayer.

Nah that was me being facetious, saying they're ripping people off annually for what is basically an identical game so they might as well sell the client once and make it subscription