Also, isn't it amazing/refreshing to see genuine gameplay from a real, live, original, high-quality Wii U game? With the exception of X, this is the only thing we've seen, basically, since before the November 18 launch. It's almost hard to believe that new content is really coming! Not that I'm done with my first batch of Wii U games yet, but it does get the hype going for a change.
I wonder if this uses an all new engine or builds off Mario Galaxies or maybe even Super Monkey Ball. Looks great though, and runs super-smooth with great graphical tricks.