I don't think a merger of this scale should occur. It reduces competition in the marketplace and is unlikely to provide any benefits to consumers.
However, that said, I'm not sure blocking a merger like this makes sense in a world where Disney was allowed to acquire a significant percentage of pop culture, or Warner Bros. Discovery can own DC Comics, CNN, HBO, and of course the titular movie studio and television networks. The mega-merger barn door isn't just open, it got ripped off of its hinges.
I find it absolutely ridiculous that the availability of fucking Call of Duty, specifically, has been the subject of top level scrutiny by regulators in multiple nations when there was nary a peep when Disney acquired Lucasfilm.