disclaimer: since NX isn't fully confirmed as a Home Console (at least partly) and the Next Handheld might not be able to do what the N3DS did with Xenoblade we're primarily talking about a home console OR a fusion of Handheld and Home Console.

I was surprised to see that apparently nobody made a topic to know what do people think about this possibility, but only stuff like "where will you buy Zelda U" that already assume there will be a port or simple rumors.

So how likely it is for you that Nintendo will give the Twilight Princess treatment to Zelda U ?

Personally I think it's very likely, not only due to the incredible sales of TP, but also how much hype is building around this Zelda game, that let me remind you is the first real Open World game in the series after the original The Legend of Zelda . Furthermore the game hasn't been acclaimed not only by fans but also by critics as we saw in 2015 at Game Awards.

I also think its very likely. TP had an incredible attach rate during the Wii launch and I think Nintendo want that, but theres no way in hell they can make an entirely new Zelda game for the launch of the NX.

Not as likely as many really think. Twilight Princess got a Wii port likely largely due to the different controller interface available

Very likely.

Is very possible, as long as nintendo releases zelda on wii u as they promised I don't care if they make a port

... that it barely used. Really lame (honestly) gesture based control. 

They ported it to Wii to cash in on extra sales. 

Which was smart. The game sold easily 2x-3x the amount of copies it would have had they kept in on the GameCube.

It's a business, I don't why people keep thinking this is a charity or like this is your best friend making games for you. It's a business. 

So the issue I've always had with this theory is that it would mean either the game releases in 2017, or NX launches in 2016. I always assumed (and still do) that NX would launch in 2017, so if Zelda U launches in 2016 it wouldn't really make much sense to port it. For Twilight Princess, it came out for the GameCube just a couple weeks after releasing for the Wii. If Zelda U comes out for NX a year after launching on the Wii U, I don't really see what the point would be, and hence believe it to be unlikely.

I'm of the assumption home console NX won't arrive until late 2017. This very well could be a sort of Skyward Sword type situation.

NX handheld might not be strong enough to run Zelda U

This might be the most expensive game in Nintendo's history. HD, large game scope, 4+ year dev cycle ... they're not going to let it rot on the Wii U where it will sell 2.5-3 million and then fizzle out.

It will easily double those sales if its in the NX launch window. There's not really much to contemplate here. 

It's definitely possible, but I think it will more be like The Last of Us, a release first on Wii U and one year later on NX, and during that year the game could be remastered.