You bring up a good point that the NX may use a different engine than Wii U so porting wouldn't simple. But for all we know, Zelda U could still be ready to launch this fall and that extra time to make Zelda U even better is actually the process of porting the whole game to the NX.
But there's no doubt Zelda "U" will be ready for NX at launch. If they have to cut dungeons like they did in Windwaker, then they will do it.







