Keeping all your fans happy all the time is naturally impossible, and a fool's errand, yes.

But we've seen with incidents like Xbox One's DRAM fiasco that pissing off consumers can backfire hard. Making Zelda NX exclusive would do more harm than good in my opinion.

Yes, because it will be a better Zelda game on the Wii U if it also comes out on the NX.  If Zelda U is a Wii U exclusive then it will go like this:  Zelda U will be released as an extremely late-gen title and is likely to be out right in the middle of the NX's big marketing push.  The game will come out and will quickly be pushed under the rug because Nintendo wants fans to be focusing on the new console.  Zelda U will be treated like the fullfilment of a commitment by Nintendo to its fans and Nintendo (knowing this) will likely have produced a good game but not one that will be revolutionary or that will take too much attention away from the NX.

If, on the other hand, if Zelda U comes to both the Wii U and the NX then Nintendo will be able to justify devoting far more resources to the game's development.  It will be a launch title that is designed to take the gaming world by storm (the same way that Mario 64 did) and Wii U owners will be the beneficiary of this since they will get a game (albeit with slightly reduced visuals) that punches way above its class had it been released as a late gen Wii U exclusive.

I think Zelda U coming to both platforms will be good for both Wii U and NX gamers as we will get a game that was truly crafted to be the best it could possibly be.  Wii U gamers like me just need to be able to swallow our pride and accept that Zelda U won't be our exclusive treat anymore... The definitive version will likely be on the NX but we will still get an amazing game!

I really don't care what platform(s) it lands on, I just wanna play it.

It doesn't really matter to me either way. I'll get it on Wii U or NX. If porting it to NX will help Ninten, then sure, why not.

No, i rather have a bigger complex open world Zelda game on NX,then a limited resource zelda like wii U will be.

It depends, but I probably would not want to if the Wii U version gets content cut to make the NX more enticing :/

How can Nintendo "port" something that isn't out yet?

Releasing the next Zelda on the NX won't delay anything, because there will be no reason for them to pull a "Twilight Princess" and release two versions of the game on two consoles simultaneously... unless you have another GC/Wii situation where the NX is barely more powerful than the Wii U, which is just not going to fly with gamers this time around so Nintendo would be shooting themselves in the foot right out of the gate if that happens.

More than likely you're getting the exact same game with maybe a bump in resolution and some little tweaks like more grass. I doubt that Nintendo is going to make a big difference between the two.

It was in production for years as a Wii U title. Even if it goes NX exclusive, they're not going to rebuild it from the ground up to be bigger and more complex than it would have been anyway on Wii U.

-Zelda is still very popular and Zelda still don't have competition. Witcher 3 and FF are not competition to Zelda. Witcher is more like Elder of Scroll game (Oblivion, Skyrim) than Zelda, and we having FF games from 80". Regardless graphics, Zelda U has very unique and beautiful graphics.

-Thats my point, Zelda TP was great launch title on Wii, same like Zelda U will be great launch title on NX.

-Yes, after initial bad reception of WW all that "we didn't want cartoon Zelda" forced Nintendo to make realistic Zelda that people wanted. But later after people actually played WW, WW become one of the most loved Zelda game and cartoon art style was accepted. You realise that WW sold 4.6 on 22m instal base while TP sold only 1.3m. Difference with Zelda U is that Zelda U has very positive reception from revile, over 90% people said "this looks beautiful" that wasn't case with WW, and Zelda U art style is far more mass appealing than WW. Also Zelda U is first HD, true open with biggest world ever Zelda game, so hype is huge. So yes, Zelda U will definatly move some NX consoles and definatly will be very strong launch title, people that dont own Wii U (and we know how small Wii U instal base is) will rather buy completly new Nintendo platform in order to play brand new Zelda game than basicly dead console.

-We cant know how much NX will actually sale, but pure fact is that on NX and Wii U will sell much better than on Wii U alone. You cant expect that TP would sell so much if stayed GC exclusive. Wii U owners will still have Zelda U, but people who dont own Wii U will not buy Wii U at end of life of console and when new console is on horizant just to play Zelda U, but they would buy brand new console with whole life in front on which they will play that new Zelda. Again you ignoring TP sales for GC and Wii, why people bought so many copies of TP on Wii that had price of $250 when GC had price of $100, you realise that TP on GC sold only 1.3m much worse than WW that sell 4.6m.

-Yes, Wii would be success even without TP because had strong and mass appealing gimmick, but point is that TP like launch title helped Wii to be so popular, Wii Sports was casual game but Zelda TP was core game, TP brought core games to Wii.

Again, with Zelda U port on NX Nintendo will have very strong launch title and they will sell several millions of copies of that game on NX alone. Only thing you can say is "Wii U will not have exclusive Zelda game", but nobody cares about that because that don't change anything, Wii U owners will still get game, fact that isnt exclusive dont change nothing esapicly in era where evre second game have some kind of a port or reamaster.