The key word you used was mainly.  Primarily people buy a Nintendo system for Nintendo games, but third party games are also necessary.  

Pricing isn't really an issue.  The Wii sold at 250.  The Wii U was 300 for its basic model.  After inflation, there's hardly a difference.  The Wii U was 50-100 cheaper than the PS4 while the Wii was 50 dollars cheaper than the 360. 

Third party support wasn't the #1 cause of the Wii U's failure, but it played a big role.  There was simply nothing to play between Nintendo releases.  Unifying the hardware can help, but they still need third party support.   And there's no reason they shouldn't have a system powerful enough to get it.

In my idea the nx is a console and their next handheld combined so they can have that incredible handheld market they have at the same time I hope they have something like twitch on their console.  Lets call it the NX view where you can stream games and your username is your Nintendo account so you can stream games and open up to let people join your game for example mario kart/brawl because kids love it. With NX view nintendo can also put some conditions about streaming connected to your account (because they love to protect their stuff).   I think it would be great if you have a NX handheld that is ofcourse portable so kids can take it to their granny's and for example play minecraft with their friends online. 

Nintendo doesn't really need to have some massive successful console to be relevant. Gamecube was outsold by PS2 and Xbox  but gamecube still made Nintendo money. Nintendo's woes wouldn't be so bad if the Wii U wasn't sold at a loss. Gamecube did sell better than Wii U but it was $199 and soon it was $99. Nintendo will be fine doing their own thing and if occasionally they pull a DS or Wii again, that's fine. But if they do what they have been doing with handhelds that outsell their competition and consoles as a supplement or as the rumor says, merge them, Nintendo will be fine. Their IP sells, their hardware sells decent numbers combined, but if they just make sure NX is priced well enough, they'll be fine.

I know. If the NX really is a hybrid, then they have nothing to worry about sales wise.

Am I the only one who wants NINTENDO POWER to mean something again?

Now youre playing with less power!

I'm kind of fine with having a Sony cosole and a Nintendo console. I just recently got an Xbone, but if it had to come down to it, 2 consoles is good for me. I wouldn't want both of them to be the same thing with different content. Nintendo, I think, focuses on cheap fun games that are really well made. By cheap, I mean the consoles. There will come a time where PS4 and Xbone graphics are easy to incorporate into any device which that time is fastly approaching. Nintendo I feel is taking it slow while catering to their audience.

I agree with the OP, NX does not need to be on par with PS4 in terms of power to be successful, it doesn't really need a huge level of third party support either, though some third party support will help for sure.

Wii U doesn't lack third party support because it isn't powerful enough, it lacks third party support because the install base is too small and because the third party titles it got sold terribly, and it has been that way for Nintendo since the N64 and especially the Gamecube days.
The original Xbox had a similar install base to the Gamecube and most of the multiplatform titles looked the same, yet the Xbox versions of FIFA and Madden outsold the Gamecube versions with something like 5 to 1 and for titles like Call of Duty and Medal of Honor it was 3 to 1.
With the 5-fold increase in install base with the Wii, these kind of games also sold roughly 5 times as much. But still FIFA 10 only sold about 1 million copies on the system. "Yes, but it was a much shittier version than the HD counterparts", true the PS3 and Xbox360 versions outsold the Wii version, do you know which other versions outsold the Wii version? The PS2 version and the PSP version. That's not on better hardware, but it's on a systems that are branded for that audience.

Nintendo's consoles will never be the prefered consoles for the GTA, FIFA, Call of Duty, Assassin's Creed, Battlefield or Madden crowds. They are not gonna buy a system from the "kid" brand Nintendo, for which hardware those titles have never had a strong history on. They know that Sony and Microsoft will satisfy their taste for those games, because they have always delivered the latest instalment in these titles for years.

What Nintendo really needs is to offer something different that could appeal to families, and they need to have a strong library of Nintendo games on their next system. Both things are something a hybrid console can do. On the software front they need to bring out all their major first party titles, Mario, Zelda, Metroid, Smash Bros, Mario Kart, Pokemon, Star Fox, Pikmin, Donkey Kong, Luigi's Mansion, Fire Emblem, Advance Wars, Animal Crossing, Xenoblade, Kirby, Splatoon, Paper Mario, Mario & Luigi, Yoshi (and Bayonetta, which isn't true first party) with strong entries in all of them, this way they'll be sure all of the existing Nintendo fans will buy the system. They need some third party titles, for instance: Monster Hunter, Dragon Quest, Yokai Watch, Bravely Default, Skylanders, Shin Megami Tensei, Persona, Rayman, Kingdom Hearts, Final Fantasy, Resident Evil, Sonic, Beyond Good and Evil.

With other words: Japanese games, kid friendly games, games with a strong history on Nintendo platforms and obscure games you can't find on competing consoles.

Nintendo should innovate, they are good at that, it should not be a regular box with nothing special.
The only thing I am concerned with is I believe it should be at least as powerfull as the Xbox One to ensure the potential of restoring third party support.

Nintendo has alienated third party support, cardridges on the N64, small low storage discs on gamecube, underpowered hardware and waving sticks on the wii (which managed because of success/gimmick) and then well.. we all know the WiiU

They should make a console that supports high storage, equal cost physical software storage on a device at least as fast as the Xbox One, whatever they do with it from that point... please... INNOVATE AWAY

Anyway that is my opinion, after the WiiU I will opt not to buy it unless its what I described above or if its a 100% handheld, with no additional gimmicks or addons

It's because the PS4 and XOne is doing well and doesn't have weird gimmicks or add ons

Whether that translates to the NX is a different question