Oh this a good time to mention that I have Guacamelee so I'm not eligible for the prize. But I wanted to participate just for fun.

And nice gif! I remember someone had this in their sig for a while!

Personally, I would like Nintendo to show the rest of the world how open world should be done. Imagine an open world Mario game where every part of it is a platforming challenge of sort. Very tightly designed without any part feeling empty, useless or like simple fillers. I know Nintendo could do it. Basically, different parts of the open world would be of a certain theme, a certain difficulty, with different enemies, and you would unlock pipes and other such shortcuts over time... All of this without any "now loading level" screen.

Think of it as the ultimate traversal platforming game. 

But that's just a wet dream of mine.