From what I understand, the MW3 campaign is complete but they only have the MW2 multiplayer on the backburner but not the MW3MP. They probably wont want to risk MW2 getting buried by Battlefield so if the new COD doesn't materalise, they'll just run Cold War for longer or make some new skinzzzz for Warzone. I reckon there will be a new COD this year though and now they know they can get away with releasing a heavily incomplete game and drip feed content in the following months.