What Nintendo needs is *gets ridiculously mile-long list* ahem...
Strictly software ATM:
1. More IP partnerships. Specifically making more 3rd-party IPs into near 1st-party, as in reliable exclusives that won't just jump ship at the first opportunity. Examples; Sonic, Bayonetta, Bomberman, etc.
The industry has already shifted towards timed-exclusives and it doesn't make business sense for a developer to only make games for one console unless there is a technology gap - which might be exactly what Nintendo is doing with the NX - after hearing about those cutting edge specs
2. New studios. Form new ones, preferably based on groups of common background, especially from their golden era. Playtonic would've been perfect. ND Cube is the right idea, it's just a shame at the moment they're on the party hamster wheel.
Nintendo already started consolidating and combining teams for exactly what you just mentioned. They have taken cues from Sony/PS4 which was a system built upon developer preference. However if they change the CPU/GPU right before the NX goes into production like they did with the Wii then I'm going to lose my shit
3. Save studios instead of seeing them go belly up. Perfect examples; Cing, Eurocom, Hudson (ND Cube is them but still, would've came with the IPs).
I wish they started doing this when THQ went under instead the industry has pretty much stabilized. Though maybe they should go for a big purchase right after they launch NX. Do you have any current recommendations? MEGATON
4. New major franchises by creators of IPs very near to them. I've said all the time that Nintendo should get Hirokazu Yasuhara, Naoto Ohshima, and Yuji Naka on a Sonic successor. And again, Playtonic with Yooka-Laylee is another.
I really love those smaller Japanese developers that could become the next RARE. Why not create exclusive agreements and/or purchase at least one developer? I just cannot recommend SEGA with their recent track record.
5. Try getting definitive versions and retail-exclusives of perfect games for them; again, YOOKA-LAYLEE!

I've thought about them publishing a retail release of an NX version, complete with amiibo support featuring DK and Diddy. Like Ninja Gaiden 3: Razor's Edge, it won't kill the other versions, but it'll be the main highlight. Sonic also failing exclusivity, but you can do both; definitive versions of multiplat Sonic games, and major exclusive entries, you get the idea.
You cannot ignore Amiibo and thus Nintendo should continue that trend. Though I believe an online service would create a massive loyal userbase. There is no excuse for Nintendo not to have their own XBL/PSN
6. Get as many JRPGs on the NX as humanly possible, thanks.
It should be fucking easy right? Western RPG developers are mainstream and aren't going anywhere anytime soon. It would perfect timing for the JRPG to make a comeback. I want to see a proper Blue Dragon/SaGA/etc
It's sad that Nintendo let slip so many obvious ideas that were in the palm of their hands. Nintendo doesn't really need to create their own GTA or whatever, just serve more of what people love about them IMO.