I would still find it amazing for 3D Mario or Mario Kart to make it this Fall. I'm sure Nintendo has some type of emergency plan for one of them this Holiday season. But I'm very interested in seeing how they make this deadline on a big budget HD entry to a mammoth intellectual property.
Nintendo has to be delaying Wii Fit Plus for dear life, because it would be sent out to die right now. Unfortunately, with Game & Wario, Pikmin 3, and The Wonderful 101. I see three straight bombs. Well Pikmin should do ok. Maybe. Not a million seller by any means.
Mario Kart is certainly the easier proposition, and would be a game that can be very easily patched up after release and added to with DLC.