Nintendo will be done with Wii U by the end of 2016. They need to focus on making sure the next portable launches strongly otherwise they are pretty much finished as a hardware maker IMO. It will be the most important launch in company history since the original Famicom/NES.

Wii U is just something that will be a forgotten part of Nintendo history, their least successful home console ever. Can't dwell on that. 

I don't want to see any new consoles until we see a new decade. so 2020 onwards. I don't want to even think about new consoles yet while the current generation hasn't proved its worth that much

Nintendo should release a new one in 2,5 years from now, on 2016 Holidays.
It should be on par with PS4/XBONE or even more powerfull as the components that we have on those will be much cheaper in 2 years.
Also it should be backwards compatible with WiiU.
This way you could have third party companies back since the development would be the same for SOny/Microsoft and we still would have amazing first party games from Nintendo.

DELETE

The problem with this idea is said console will be stuck in the same predicament the Wii U is ... no one wants a Wii U because they already have a PS3/360.

By fall 2016 most people will own a PS4 or XBox One, and not only that but both systems will have hundreds of games available for them whereas the hypothetical Nintendo console will be starting with like 12-16 games at best. 

In other words, it won't be any different from whats happening with the Wii U, only the most die-hard Nintendo fans will buy it. 

No one will care about Wii U backwards compatibility either, lol. 

Not same, Wii U came out at end of PS3/Xbox360 era and just one year before XboxOne/PS4, next Nintendo home console will probably come at middle of XboxOne/PS4 life span and few years before next cycle of consoles.

It will be very different from what's happening to Wii U, Wii U had many problems, starting with bad console name and bad marketing, games drought, not good hardware for 3rd party developers...and so on, next Nintendo console probably will not have that problems and will have fixed Wii U problem from start, like a unified account.

But for all that I would say that 2017 is more realistic for Nintendo home console than 2016, new handheld and home console will have havy integration, and next handheld will probably come out in 2016.

The net result will be the same. Only Nintendo fans will buy a Nintendo "PS4" over the actual PS4. I don't think third parties will even give them token support this time around either, Nintendo will have to pay the piper for the Wii U flop and that means little/no trust from third parties. They will stick with PS4/X1. 

PS4 will be $299.99 by fall 2016, X1 may be cheaper, both will have hundreds of games and developers will have all their resources invested there. PS4 will probably be sitting at around 40 million userbase headstart, that's even larger than the headstart the PS2 got over the GameCube. Nintendo wouldn't even be competetive. If you're talking 2017, the situation will be even worse, PS4 will probably be $250 and the userbase will be past 60+ million, while Nintendo is starting at 0. 

Nintendo will need to either release something much more powerful than the PS4 (which I doubt is in the cards) or something that's a budget device, I think that's probably more likely. Something that allows people to play handheld games (from Nintendo's next-gen handheld) on the TV as a side option, like the Vita TV is far (far) more likely. 

You had me until that last line, which is quite presumptuous.  If anything, WiiU software deserves more exposure than it will likely receive on the console.  This conversation here is very interesting regarding WiiU's successor and backwards compatibility:

http://gamrconnect.vgchartz.com/post.php?id=6559603

when it turns 5 years old

If they can support the system until 2017, then that's enough for me. Mind you, they need a lot of support between now and then, but if they can significantly ramp up 2nd party development, then it won't be a huge problem.