If Nintendo Makes Another 3D Mario for Wii U, What Would You Want in It?

[Nintentacle]

Question in the title. It's possible that they're doing it, since they're already working on a new one (But they never said if it was on Wii U or 3DS). What would you want from it it It's on the Wii U?

I'd personally want a new setting, "Full" 3D, and as much exploration as the first Galaxy game. And, obviously, more content.