Now it's even clearer that Nintendo is shifting their support from Wii U to NX.
Mario Maker launching September 2015, Project Treasure published by Bamco.
Yes indeed there are games from third-parties coming to Nintendo's platforms.
Yes: Shin Megami Tensei X Fire Emblem is still happening.
Yup, there's actual third-parties on Nintendo.
Most titles in development at Nintendo are actually on Wii U since that's what their next consoles will be made from.