I can see a semi-realistic merger/ acquisition with Konami, Capcom, and maybe Marvelous AQL
Bandai Namco and Square Enix wouldn't be options because they hold strong holds in other industries and the government seems to disapprove of that (with Nintendo's previous effort to buy out Bandai).
Sega-sammy would be absolutely toxic to them since so much of SEGA is arcade and PCs now. Sonic is the only real thing on consoles that's profitable plus maybe Racing









