Almost guaranteed. Nintendo wouldn't spend the huge amount of money a game like Zelda takes and simply put it on the absolutely terrible install base of the Wii U when the opportunity to put it on a new console exists.

I think it's certain that the game will release on another console other than the Wii U.
With the game being delayed for a dying console (2016 won't be good for Wii U) it makes perfect sense to have it ported to NX even if NX is just a portable.

I'd say IF the NX is a home console with more power than the wiiU, it's probably 90% likely.

They'll have been working on this for nearly 5 years if it's a holiday 2016 title. That's huge for a Nintendo game and with the current install base of the Wii U, I seriously doubt they're looking at very big profits, if at all. Given that it sounds like it's gonna be a massive game, it'll also be quite a while before the next original entry in the series (although I'm gonna predict a Twilight Princess remaster at some point, which is more likely than  Skyward Sword as it works without motion controls).

Oh cmon, that's nonsense. It got a Wii port due to massive extra sales potential available.

Then from a business stand point, why don't they make a 3D mario game in the vein of Galaxy and and make that multigen? It seems they would make a LOOOOOOOOOT (I mean it is honestly not even remotely close) more money that way. We can pretty much assume one of those is in the works too.

Likely, though pretty stupid if you ask me. It's gonna piss some people off, and there are games that would make a lot more than a Zelda game they could release as a multigen title. As I replied to someone else, a true 3D Mario game would be much more lucrative and far easier to make for two systems.

Honestly I don't think so, The next 3D Mario game has for shure started its developing and to make it multigen they need to develop it for both consoles and to do such a thing they would have to pull back the NX version since Nintendo differently from other companies doesn't simply cut off slices of Games if they can't run on a console, plus I don't really know how much profit they would get from another 3D Mario on the Wii U (I'm assuming it would release first on NX and then on Wii U) since there's already SM3DW

In what ways exactly? Mario has never been a game that needed excessive power, and instead relies on its art direction to impress. If Black Ops 3 or Metal Gear V can run on PS3 and PS4 I doubt much of anything would have to change on a Mario title.

It will be higly focused on the NX gimmik as most of Mario games do to promote the new console, and to do so there would be huge differences between the two versions, just immagine if NX runs Unreal Engine 4... Plus BO3 won't have many features in the PS3 version and MGSV runs at about 20FPS as far as I know...

But those are increadibly graphics intensive, no doubt they would not run as well but Mario isn't going to run on the Fox Engine, lol. The fact that those games can run at all is proof that Mario could work. And Mario heavily focusing on the consoles gimmick?... Not Mario Galaxy, or Mario 3D World. You only used motion controls to point the star curser to the star pieces in Galaxy, and only used the gamepad to find hidden blocks... So the past 3 Mario games (Galaxy 1 and 2 and 3D World) have not really been completely dependent on the gimmick of the console, and before that there really weren't any gimmicks on the controller design.

Not entirely true as Galaxy had certain designs in various levels that utilize the console's features, like using motion controls for balancing on a ball in one level to navigate a course or using the pointer to control air flow in another to move Mario trapped in a bubble through hazards or even in in space using the point to have the gravity grab Mario. The features were used quite notably.