CMA has said that in order for them to approve the deal Microsoft would need to release certain parts of ABK. They either need to give up Call of Duty and all studios associated with it, give up all of Activision, give up both Activision and Blizzard (leaving them King), or watch the deal get blocked. They have suggested they may allow a behavioral remedy, such as making Call of Duty on all platforms and at absolute parity for a very long time, but that is not likely as regulators find such remedies a pain in the ass to keep up with.