Just recently found this and not sure if it is real, but both on the Inquirer and on Polygon, Microsoft may be considering buying EA, PUBG, and possibly Valve?
Now from reading Polygon's article on the situation it would seem that most of it is in the Rumor mill, and there is a good chance Microsoft Uppers probably talk about stuff like this more often than not, but from what van Druenen says “Because of where we are in the lifecycle of all these things, I’m expecting to hear Microsoft announce something very, very shortly,” we might be finding out if these rumors are true maybe this year.
Personally I could see this more likely to happen with say EA, is if Anthem doesn't go as planned as they want it to, and/or if the new Dragon Age doesn't create new enough people into the Dragon Age genre of video games.
But I think the biggest thing to note that yes this is a rumor, and this is most likely something that is talked about more often than we realize it, and the majority of the time it is just random things that will never happen.
But I don't know, maybe Sony will buy them first. https://www.theinquirer.net/inquirer/news/3025595/microsoft-considering-buying-valve-ea-and-pubg-corp https://www.polygon.com/2018/1/29/16930892/xbox-one-exclusive-games-analysis-microsoft