Don't make me laugh. You don't know what you're speaking about...

Yeah it wouldn't be named that lol. It wouldn't even necessarily be a sequel - just a full fledged 3D Mario without any gimmicks.

"Super" (in an explosion bubble, similar to NSMB) Wii, was the more than obvious way to go for branding. "Super" indicates new, that it can do a lot more than the previous iteration, etc. Power would be what devs require for next gen minimum (near 1 tflop). Gamepad should have been a future side project in development or their new peripheral, with a much more crafty, mainstream design to really aim for the tablet market.

I still don't get why Ninty bet so hard on the gamepad, when they themselves didn't have a great plan behind it. Its hard to reduce the consoles price, not to mentionit being severely under powered... a lose-lose situation.

Nintendo has to admit (to itself) we are in the gadget era, where features and specs matter to people. Force feeding expensive peripherals is never the way to go. Peripherals should always be optional, give them a chance to become popular and then, incorporate them into new skus. Unless you are 100% sure to create a new standard, its always the smart way to begin with the conventional approach. Nintendo being deathly afraid of competition has turned their strength of being innovators, into being exhausted from trying too hard attempting to reinvent the wheel each time.

A lot more stuff and better.

Specifically amazing marketing, hype 1st year full of games and (improved) PRO CONTROLLER as the ONLY controller, with a catchy name like Dualshock is.

Sorry...but that name, while cool sounding, implies that Nintendo was dead.  That may have worked when they were naming the Wii, but it doesn't hold water for the follow-up to one of the best selling consoles of all time.  Now for Nintendo's next console...I'm on board with you there.  Of course there'll be people who start calling it the Nintendo Phonics...as in, a console for all the babies.  You never can impress everyone, especially us internet trolls.

- Different name which makes it clearly an upgrade. SuperWii is alright, but preferably a different brand. 

- Release same year as PS4/One (support Wii with more games at the end of its lifetime.) 

- Motion Controls would remain the focus, but most games will also support dual-analog controls (if motion controls aren't necessary.) Wii Motion + is absolutely perfect in my opinion. 

- AMD APU or CPU underclocked, something along the lines of an A6 3650 ($70) or FX 6300 ($100) depending on Nintendo's pricepoint.  

- Something along the lines of an HD 6670/HD7670 - 768 GFLOPS, will be able to run less intensive games at 900p/1080p and more intensive games at 720p with AA on a regular basis than the Wii U can currently. This GPU costs about $70 at retail. Nintendo could add their own touchups. 

-  4 gb of unified GDDR5 ram (3 gb available for games.) Nintendo could add their own little features for improved bandwidth. 

- Software emulation for Wii games. An A6-3650 is capable of running dolphin for many games. If Nintendo built their own emulator which took advantage of more than two cores I have confidence they can run Wii games fine, especially since they know the Wii's true specs more than anybody else. Nintendo can underclock the cpu to fit their chassis size and power requirements and still probably emulate Wii games. 

- Sell the console for $250 without a game, or $300 with a game. The APU/CPU would likely cost $50-70 per item (since it is in bulk), gpu about $60 as well. The entire chipset with ram probably around $160-180. The external power supply would be $10, and the cost to manufacturer the case about $10. Then retail and shipping costs about $30. That would make the cost to produce with a controller and hdmi cable somewhere between $200-250, which means Nintendo won't be selling the console at huge lost. 

Overall this console wouldn't be too far behind the Xbone power-wise, and at the same time it would be cheap. Nintendo would also still have the unique feature of workable motion controls, which still had many applications to be made. Furthermore, Nintendo could have released the console with its same first party line-up, but without so many droughts because they waited a year. Its cheap price-point and great first-party games would give it momentum after its launch. 

I would have made the CPU quadcore instead of triplecore (same chip due to backwards compatibility), a somewhat better graphics chip (Probably 512 VLIW4 cores instead of 320, GCN weren't ready for such a development just yet back then) and included a standard internet connection socket (instead of needing a special USB Adapter for this). Oh, and maybe produced the chips in 32 or 28nm instead of 45 to lower the heat output and keep the system as small as it is. And 4 instead 2 GiB RAM.

On the software side, I would have lauchned the console with a bit less games (there where 23 at launch!) and spread their releases a bit out to fill out the gaps a bit until spring. Nintendo was unprepared for HD Graphics, but that was one of the 2 reasons why 3rd party came first (the other being them complaining not selling enough games on Nintendos consoles due to the first pary games) and could have worked out for both Nintendo and the 3rd party developers, but sadly it didn't. It was a nice try from nintendo, but it not only failed, but backfired horribly, someting one couldn't know for sure during development. It was risky, but Nintendo isn't exactly risk-averse when it comes to trying out new ways or new things. i would also have tried to attract more Indie devs and bringing out Indie (and possibly Virtual console) collections on disc to fill some later gaps in the software lineup.

As for the name, I would have called it Wii too (for those who don't fully get it, a double wordplay on we, too, aiming at the core gamers, and Wii 2)

Prices would be about the same as they where.

And no, not cutting the Gamepad away, instead opting for the possibility to connect more than one of them on the console (which was actually considered by Nintendo, but not feasable because the console was too weak for this). I would however have reversed the button/Thumbstick layout on the right side to match the one on the gamecube controller, and maybe opted for a stronger battery if this was possible ont he budget back then.

I uhh don't know anything about designing a games console I probably would have made it worse.