Can't be a 2015 delay. MK8 is a big game and that is perfect for 1st half of this year, but they'll need another for fall. That is SSB. Its the only other Nintendo IP that is big that we know is supposed to release this year.
I'd highly doubt they'd leave fall for the 2nd tier games like yoshi and bayonetta2.
Of course, unless they announce Zelda (surprise 2014 launch) or some spectacular looking exclusive FPS (something not really up Nintendo's ally).







