It boils down to simply this.
No matter how much Sony and specific individuals wish it were something it isn't, facts are facts and Microsoft's acquisition of Activision Blizzard does not meet the acceptable criteria for a successfully blocked merger. It doesn't even meet the bare minimum requirement. The deal is on solid foundation in every area that you could possibly look at it. Marketshare % on consoles worldwide and specific major markets, multi-game subscription services, PC, overall console software sales share on Xbox or Playstation, on both. Even merged with Xbox Activision Blizzard in total only accounts less than 20-30% worldwide and in the UK combined. These are the thresholds by which they weigh mergers and decisions in which to block them.
The only remotely touchy subject matter is whether Microsoft decides to remove COD from Playstation, which even if they did, it would still not produce the type of substantial damage that Sony is claiming. No amount of cooking of the numbers on their side to make Call of Duty appear more important to the success of all other games on Playstation, including God of War, Uncharted, Destiny, Last of Us, Ghost of Tsushima, Final Fantasy, Elden Ring etc., is going to make a case for Sony that simply is not there. The best argument they have is "hey, they'll take away Call of Duty from us", and all Microsoft need do is commit to just that.
Activision Blizzard games were never going to be a meaningful component of any multi-game subscription service. The mere suggestion from Sony that they would be, contrary to Activision's own internal documents and existing business history, is something that can't be treated as serious.
And the biggest element being overlooked, its immediate benefit to consumers. It doesn't matter if all the same benefits won't be on playstation, because that's what competition is. No matter what Sony says about ps plus now, and it being seen as "lesser" than Game Pass, that is nobody's fault but Sony's own. Sony had PS Now years before Microsoft had Game Pass, and it is Sony's own bad decisions that have made them fall behind Game Pass, a service that came years after Sony's own options. And Microsoft has chosen to go out of their way in their filing to hammer more aggressively on the fact that Sony possesses a very simple means to enhance the competitive nature of PS Plus. 'Day One' releases of more third party and first party titles the way Game Pass does.
A key component of this deal's evaluation is "will it be pro-consumer?" it will be in a ton of ways right away.
Oh, and check out Microsoft calling out CMA for not even reviewing Amazon's deal to purchase MGM on very similar grounds they seem to be taking exception to with Activision Blizzard's properties.
This piece is important because it lays out exactly what the high standard for a phase 2 blocking of a deal is, "the balance of probabilities."
On the lesser standard of phase 1, CMA can find a "realistic prospect" but on phase 2's higher standard of balance of probabilities no such thing can be found, and this is supported by the raw data.
Sony can't successfully challenge any of the information provided in the chart below. The numbers are simply against them. Feelings will not carry the day in this deal, only real data will. Microsoft is showing real data that even if Call of Duty were to be taken from Playstation, what Sony is claiming is simply not possible. Anyone with an ounce of common sense will get this.