Twilight Princess was released on GC and Wii and later as an HD remaster on Wii U.

Will we see the upcoming Zelda U in some years as an "4k-remaster" as well?

So could I skip the NX and just wait for its sucsessor to play the ultimative Zelda game in its ultimative version?

Might Nintendo even delay the game that often again that they will release it on Wii U, NX and NX succsessor simultaneously (advertise the NX-Console now with the new Zelda game, use that hype to also sell the NX successor?)

Will this game ever get released or will it just be used to sell consoles?

Nope, there won't be that big of an improvement graphically to justify a porting, if anything it'll probably be available via backwards compatibility...

Sure, you could wait 15 years, and get a better version like Ocarina Of Time 3D.i mean, its your life, do what you want with it

Not before Skyward Sword HD.

No.

Well i still have final fantasy 15, witcher 3, metal gear solid 5, batman arkham knight, kingdom hearts 3, final Fantasy 7, Shenmue 3, The Last Guardian, Mirrors Edge Catalyst, Mass effect andromeda, Horizon Zero Dawn, No Mans sky, Uncharted 4, Ratchet and Clank, Kingdom hearts 2.8 and much much more I could play in the meantime so its not to bad to wait.

Also if the NX fails like the wii u did (and so far it looks like thats really possible) I expect an NX Successor already very early (2020/2021). Then, when finally nintendo will do everything right (holiday release, third party support, e3 presense and co) I might get the NX successor and enjoy zelda in its best version.

Noone's stopping you from waiting lol.

The answer to your question is yes, but generally Zelda games are remastered around 10 years after they release, so yeah.

I already waited 6 years for that games if it will be released (maybe even longer) so yeah, i really dont care anymore^^ I can wait. 

Good for you bud :P