If there is one video game IP nintendo should own, wich one?

[WhiteEaglePL]

Bayonetta. Because then I have guaranteed supply of Bayonetta sequals in the future, and Bayonetta in Smash.

Also, GTA. That's big. It will sell very very very very well even on Nintendo. (GTA 5 would on Wii U at least 4m. At least.)