Topic: Gaining third-party support.

I have one solution, that might be seen as too dumb or easy, but it might quite work.
Dumbing the "Nintendo: (insert console)" name. It instantly makes the console classyfied as kiddy, and I'm not even kidding.
I own a Wii U myself and I enjoy the first-party titles, but the lack of third-party is really sad. Oh, and do Sony & Microsoft make their names like that? Sony Playstation 4? Microsoft Xbox One? No I didn't think so either.
Can it be that simple?

No.

Third parties (as we know that term to mean on the PS4/Xbox) will never come back to the Wii U, and if Nintendo's next console is as strange as it sounds it could be, they won't be putting out games on that one either.

You mean a Nintendo Wii U(?)

Sorry I'm confused. Your suggestion is to drop the Nintendo name from the console? Everyone already does that, yourself included.

Um, Nintendo doesn't brand it as the "Nintendo Wii U". They haven't done that since Gamecube.

Well, the GameCube was titled 'Nintendo GameCube', and that was the official name...

But Wii is a brand name, which is why Nintendo doesn't put their name before it. Just like Game Boy.

Nintendo themself always advertises the Wii U as Nintendo Wii U.

No, they haven't

Indeed.

That alone won't bring back third parties. The name is part of their image problem, sure. But they'd need to do a whole lot to get attention again. Probably more than they'd ever be willing to do.

The only quick and easy way for Nintendo to get third parties back would be to make their next console a carbon-copy of the PS5 and next Xbox and pay bucketloads of cash out to the third party devs.

I think the 3rd party situation is complicated. I'll break it down into three parts

1. Lack of confidence/burned bridges with Nintendo
3rd Parties have seen such little success with Nintendo in recent years, and they had such negative experiences in years prior, that they are simply far less willing to give Nintendo a chance

2. Hardware
Since the N64, there has been some aspect of Nintendo's hardware that has deterred 3rd parties. With the N64 it was cartridges. With the GC, it was minidiscs and a lack of online. With the Wii and Wii U, it was low power

3. Advertising
Nintendo doesn't give 3rd parties enough space. If you look at a PS4 or XB1 ad, it's filled with a mix of 1st and 3rd party content. Hell, even the original "Wii Would Like to Play" ad featured a mix of Madden, Red Steel, Zelda, and Wii Sports. But it's not all on Nintendo's side. 3rd party games straight up aren't advertised for Nintendo platforms. Assassin's Creed Black Flag and Watch Dogs weren't even associated with the Wii U in advertisements.

So how can Nintendo get 3rd party support on the NX?

1. Make the hardware competitively powerful.
2. Strike deals with 3rd parties to bring games to the Wii U in exchange for advertising on the system.

Sales, easy development and horsepower. Ultimately that's all third parties care about and in that order. For a Wii U successor? When the next generation comes around I'm not sure how much power will matter unless there is a real push to go above 1080p. So I wouldn't worry too much about that. Easy development is solved by making sure there isn't a hurdle to jump over. Giving up on backwards compatibility and going for an x86 based machine would help. Sales is the tricky one, chicken and the egg stuff. The only thing that can be done there is a great launch, Nintendo needs to come out blazing with great content off their own back.

But I don't think the NX won't be a home console, so here's my answer to this question with regards to their portable business. Nintendo dominates portable sales and I don't see that changing anytime soon. But as with the home-console that's the main ticket, Nintendo again needs to push out great content early. Then if it moves tens of millions devs who want to make a portable game will have to seriously consider the NX. What Nintendo then needs to do is make sure that there aren't too many hardware hurdles. Things which are definitely there on the 3DS, more than there are on the Wii U even. It's no surprise that the 3DS got a dodgy port of Rayman Origins and then nothing at all for Legends but the Vita got both. The hardware isn't upto it.

To get 3rd party back will require more than a beast of a machine. It will require some behind the scenes corporate c#@k suckin and a lot of back scratching. 3rd party devs are woried they will get burnt so it will need all the right staff at nintendo and real cooperation with leading developers when designing the machine. It needs to be at least 5 years future proof in console terms