I really hope that for the next Mario Kart they make a Mario Kart Adventure game. There's just so much that can be done by allowing us to take these Karts into open environments. Would be a cool way to introduce both exploration and great battle arenas into the game. You could find wheels and cars in hidden caves and by doing amazing jumps (hiding cars in plain sight at the apex of incredible jumps). Of course, the main aspect of the game would still be the races, but this would be a cool way to open up the game. It really bothers me that I'm seeing all of these cool levels and yet I can't go explore those regions.