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

[curl-6]

osed125 said:

If it's true, it's probably just a small team working on MK U (mostly just helping). The core team is definitely working on something huge. If not then I will hate Nintendo forever (probably not but you get the point).

If they're split into multiple teams I wouldn't mind some of them workng on Kart U, but if that's their big mystery project I will probably cry.