It’s a bit complicated for a foreign company to buy out a Japanese company from what I understand. It would be great if they bought mystwalker... I just don’t see it happening. I would love somebody to buy sega though. They seem to be incredibly mismanaged... they have been sitting on a gold mine of IP’s and doing nothing about it...
Generally speaking, companies don't buy other companies that are poorly managed. They might buy some IP from Sega though.