From a technical standpoint it seems unlikely, right now everything points to NX having a different architecture, a controller without a screen, and completely different specs, so backward compatibility would be very difficult to do.
On the other hand I think Nintendo really wants to and needs to bring BC:
Firstly to appease the Wii U Owners. Give them the ability to transfer their saves and everything, just like from Wii to Wii U and keep playing the games they bought on a new console without any extra cost.
And secondly to boost their launch lineup: Wii U had some of the best Nintendo games in years, and many people still havent played them. I actually know quite a lot of people that are saying: "Yes that looks awesome, and I'd love to play it, but the Wii U isnt going to be around for much longer anyway, it would be a waste!"
If all Wii U Games are compatible from day 1 it would give the NX a huge boost, after all many of those games, eg. Smash or Xenoblade, took many long years to develop. Just throwing that away and making new entries for NX would be a waste and take a whole lot of time.
The difficult part is: How can you offer BC for the gamepad if the NX doesnt have one? The best option I can see here is that the Wii U Gamepad will be compatible with NX and Nintendo will start selling Gamepads by themselves for a decent price. Another possiblity would be the integration of the often rumored NX-Handheld. Architecture and the like can easily be solved via emulation (see Xbox One BC), but the Gamepad could pose a major problem.
As a Wii U owner I really hope they to implement some kind of BC, there have been rumors about ports, and I'm NOT looking forward to buying the same games once more!
The new guy.
Sorry for possible mistakes, not a native speaker!
