I have an idea for the NX. The NX will have two parts: the WiiX and the DSX
The WiiX is the main system and can be paired with the DSX. The DSX and WiiX will have seperate games but WiiX games can be streamed to the DSX if both systems are connected to the internet. Each WiiX Game will come with a Mini-Game for the DSX. For example if there were to be a Smash Bros. For NX the mini-game would be a StreetSmash like game where you can earn coins and trophies and stuff. The WiiX will be compatible with Wii U games and Wii U controllers. The 3DS can also be paired with the WiiX but will not have streaming capabillities. The DSX will also be compatible with 3DS games.
Of course this is just an idea and the real NX will probably be way different but I thought it would be cool to post my idea of what the NX should be like.