Platform done, Adventure done, FPA done, RTS done, now I would like an RPG but I don't think is the genre for Miyamoto and a racing game is not needed since there's already Mario Kart. We already have a great fighter game like SSB. so really, as of now I don't know what genre Miyamoto could improve with his great ability...something between multiple genres, like Puzzle Quest, would be great! Probably the only new genre for him with an important new character would be an RPG though.