Disturbing thought/rumor: Retro working on Mario Kart U?

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nuckles87 said:
This isn't disturbing, it's exciting. Out of all of Nintendo's franchises, Mario Kart is the one most in need of some real innovative change in its game design. Mario Kart could use a Metroid Prime/DKCR style revamp.

I very much doubt they'd be allowed to though; Nintendo would make them stick to the tried and true and put their creative talents to waste.