I'd rather nintendo just commit seppuku and die with their pride intact than to sell to either of them. They have a charm all their own that I don't think would survive that transition.
The best thing that could have happened for video games was Nintendo and Sony not merging their efforts back in the 90's; they're both bringing different things to the industry, push one another at times, and offer different experiences. For that reason I can't bring myself to pick an option lol
Ah yeah, I don't think I need to explain why microsoft is also a bad idea... RIP Rare.