I made threads on Nintendo and Microsoft buying devs in the past, so I suggest reading them.
Developers that Microsoft needs to buy
Developers that Nintendo needs to buy
I haven't made one for Sony yet.
Microsoft
I don't see HVS being a good fit because they aren't the best developer. They have been in business for over 15 years, and they haven't made a single game that got good reviews, plus they're mostly a shovelware dev. Insomniac also doesn't seem like a good fit because they do most of their developing on the PS3. Epic Games is ok.
Sony
Platinum Games can go both ways. Their games are good, but their talent doesn't seem like the type Sony would want. Q-Games is a good fit. Sucker Punch is also a good fit. Quantic Dream is good, because of the IP rights to Heavy Rain, ad because of the Motion Capture that they do.
Nintendo
Next Level Games is a perfect fit. Silicon Knights, is good, as long as they make top selling games, and the talent doesn't leave. thatgamecompany wouldn't make any sense because all of their work has been for Sony. They would make more sense if they went multiplat.
