• handheld device: end of 2016, two screens, 720p resolution for both screens, 3DS similiar cards, touchpen, microphone, gyro-sensor, cameras, power is a bit over the PS Vita, price will be at 200$/€, both normal-sized and XL versions will be available at launch, major developers have development kits since October 2015. Nintendo is aiming to launch the system with a new Mario Kart game from EPD and a new Animal Crossing game also from EPD. During the first year there will be a new 3D Mario game from EPD Tokyo, a new Advance Wars game from Intelligent Systems and a game that is developed by Bandai Namco Entertainment and published by Nintendo. Masahiro Sakurai is also working on a game.

• home console: end of 2017, native 1080p for games, BlueRay-Discs, Touchscreen controller with 720p touchscreen, microphone, camera, gyro-sensor and SD cards slot, power a bit over PS4, x86 structure, easy porting, 1TB harddrive included, price probably at 350$/€, development kits aren't out yet, but they will be before July. A port of the new Zelda game for Wii U and a new Metroid game from Retro Studios are prepared for launch. In the first year there will be a new IP and a successor to Splatoon. Nintendo has also partnered with Ubisoft Montreal for a game but it's unknown what type of game it will be. I've also heard that Nintendo might have a deal with From Software for an exclusive game.

Source: https://www.reddit.com/r/NintendoNX/comments/4ceokp/nx_details/

Those are not made by Nintendo,TPHD is made by Tantulus,SFZ is by Platinum,M&S by Sega,TMS by Atlus and already out in Japan and Pokken is made by Namco and is a port of an arcade game. Kimishima said 1 time(not several)that they had unannounced games Wii U and 3DS,not just Wii U games, and since then they have announce SF:Guard(a small project in the works since at least 2014),TPHD(again made a 3rd party studio),PM,Pokemon and Kirby that's 2 new Wii U games, a HD port of a gamecube game and 2 3DS games.

Even if it's in clear decline, Nintendo won't abandon its most profitable market, and handheld games are becoming bigger and bigger. If it's not in 2017, we will eventually see a NX handheld that shares the home console library in some way or another.

TPHD is co-developed by Tantalus and Star Fox Zero is co-developed by Platinum Games. Main development is done at EPD. And Kimishima said there are more unannounced Wii U games, he wants more Splatoon-like games on the Wii U etc. That's more than one time. There's more to come. If not, Kimishima is a liar.

Even Iwata said that after the NX launch there will be more Wii U and 3DS software, because everything else would be ineffective.

TPHD is co-developed by Tantalus and Star Fox Zero is co-developed by Platinum Games. Main development is done at EPD. And Kimishima said there are more unannounced Wii U games, he wants more Splatoon-like games on the Wii U etc. That's more than one time. There's more to come. If not, Kimishima is a liar.

Even Iwata said that after the NX launch there will be more Wii U and 3DS software, because everything else would be ineffective.

Again Kimishima said more Wii U and 3DS games and he said that in late October before TPHD,SFG & PM were annonuce his most recent statement about unannounced games was about the 3DS not the Wii U,also he said that yes he wants more games like Splatoon and SMM but he didn't said on what platform,TPHD is made by Tantulus and supervised by Aonuma much like OoT3D,MM3D and HW were,as far as SFZ goes nobody can say for sure how Nintendo and PG are making it so neither you or I can say for sure were the main development of the game is being made