https://wccftech.com/microsoft-gave-encouraging-assurances-on-the-activision-blizzard-deal-says-us-rep/

The Microsoft + Activision Blizzard deal will surely undergo regulatory scrutiny, given its enormous size (nearly $70 billion, the biggest acquisition in the US since 2019's Bristol-Myers Squibb - Celgene deal).

It looks like Microsoft has already begun testing waters beforehand, anyway. The Washington Post quoted US Congressman Ken Buck saying that the Seattle-based tech giant has already provided what he described as encouraging assurances on the matter.