Prediction-A late summer early fall Smash release means a holiday 2014 Zelda U release date!

[fleischr]

Here's what I consider ideal release timing following MK8

June - Watch Dogs
July - Hyrule Warriors
August - Bayonetta 2
September - Super Smash Bros
October - NFC based title
November - Zelda U
December - Yarn Yoshi
Early 2015 - X, Devil's Third, Human Element

Either way, there's enough out there to have a major release every month after MK8 releases.