We need game companies to stay being game companies and not these big companies buy up the entire ecosystems. MS knows that their own dev studios suck and can't turn out quality games. They don't know nor cares about how to be like Nintendo. If nintendo was for sale then M$ would definitely pay the ransom. If Sony or MS swallowed up all of the game IPs there won't be any new quality games. There will be more DLCs.
When EA bought out Maxis for Sims. Look what happened, Sims 3 became this massive DLC money grab and Sim 4 is the same.