Most of the comments here are uninformed on the law and the underlying market dynamics. My job involves analyzing the games market and there is no reasonable support to the claim that this deal will significantly harm competition in itself. Various parties might not like it for various reasons, but it would be pretty bog-standard, business-as-usual in video games. Activision is big but its portfolio isn’t big enough to single-handedly sew up the market for long. Huge swings happen every decade and no content or IP is guaranteed to keep its influence for very long. Xbox is in a distant third among consoles and MS would lose more money by pulling their biggest titles from the biggest console platform (PlayStation) than they’d gain by muscling more device share. They’d also degrade the value of the product because cross-platform play is basically table stakes and gamers would move towards games they can play together. MS is proving all this by offering all other platforms access to said content (which Nintendo and most others have accepted, but Sony has performatively refused). Some smaller content will be held exclusive, but that’s the running standard in the industry and has been for all time.
So, the FTC really doesn’t have shit here. They’re going to lose the ongoing injunction case and by all likelihood MS will close the deal before the July 18th deadline.
The UK’s Competitive Markets Authority is also holding it up (but notably, no other major regulator has objected, including the EU which has the most regulatory credibility). Playstation has a huge corporate presence and its European HQ in the UK, so the CMA is likely driven by local lobbying strength combined with similar political motivations (further bolstered by pressure from the current FTC commissioners, which has been reported). The CMA’s objection is (amazingly) even more poorly constructed, based on the argument that this will make future “cloud gaming” markets uncompetitive. I’ll spare you the details, but that is even more comically ridiculous than the FTC case. Once the FTC loses this injunction, the CMA will have to fold or else they will be embarrassed as a regulatory body by Microsoft closing the deal over their objections and showing them to have no teeth (and no clue).