ABK is the money printer that keeps the lights on indefinitely at Xbox imo. It's not exciting like Bethesda was to me. (And, boy, was that exciting.) But it does allow Xbox to continue with their current vision imo. Letting smaller studios continue to experiment and do their own things while the money printer of COD go brrrrr.
They have plenty of work to do to get ABK up to snuff, and I could see them taking some years off. Even one year off per release cycle gives every team 4 years instead of 3 to make the games. But, to me, it makes sense that Activision proper is going to be laser-focused on keeping that money printer going. I think they will be able to peel off those teams like TFB and Beenox eventually and just hire up in their places internally with the extra MS money, but for now, I assume they will keep greasing the wheels for COD.
I could even see them decoupling MP altogether like they have tried to do with Warzone and having updates yearly on that front that changes things up dramatically. Don't know what that would look like or how it would work for efficiency but it's one possibility to free up some of the teams.
Lots of fun times ahead for these OTs for speculating and arguing tho!