It seems like they are trying to keep the NXtech under wraps so I doubt they reveal anything about it until near release.
Nintendo probably don't want to show any games too early (like Star Fox) and get criticised for how bad they look.
I'm guessing that this year Nintendo will be focusing on mobile games like Pokemon Go and building Brand awareness, then in December they will declare 2017 the year of the NX. Then Regular directs will start up to hype launch games, for release in March at a slightly higher price point, before a good summer sale and then an August Price drop for the Holidays