Hope Microsoft just says fuck it and acquires some smaller studios in the meantime, CMA has made their position clear, a few less than ~200m studios aren't changing that. They need to get some of their support studios like Certain Affinity under their belt and Asobo if possible. Bulk up their support network with other acquisitions to get games out quicker.
As I said before, Xbox didn't own Activision before and still don't own them now, they have a very strong line-up of AAAs in the near future but they need to get them out consistently now, can't afford to wait around for Activision-Blizzard for another year either, they can still appeal the process but let the lawyers handle that shit, Xbox business has to continue to grow.
Thankfully it does continue to grow, some big exclusives coming in the near future as well, but they may have to start thinking about their plans without Activision-Blizzard, I'm assuming it will just be reverting back to their plans post-Zenimax acquisition but those titles are taking a bit to release, obviously they can't go for another publisher in the meanwhile but they can go harder on marketing, content and studio acquisition.
They will still be "all in" on Gaming with Zenimax but probably without their Mobile aspirations and having to adjust some growth forecasts.