If I was President of Nintendo and could snap my fingers and make anything I want happen, these are what I'd do, and these are truely what I'd do:
1. Buy Banjo from MS, best not to go after Rare itself, it's too far gone now, instead, try to rope in as many of the veterans as possible and form a brand-new EU studio, the folks will include Grant Kirkhope, Dave Wise, Chris Seavor, and will attempt to rope in Flippin Pixels and Nyamyam after they're done their indie games. The team will make Banjo-Threeie for Wii U, Banjo-Kazooie 3D, and will take charge of DK again. Also I'd get the entire DKR cast back, and then try for Conker afterward. Try to get most if not all the platforming IPs.
2. Buy Bomberman and have ND Cube take charge of it, starting with Bomberman 64 3D, then a true sequel for Wii U, but of course they'll work on Mario Party 10 alongside, if all goes well, I would try to scope what other Hudson IPs I can get, maybe get Do Re Mi Fantasy and Bonk.
3. Go to Sega and at least negotiate that EAD Tokyo can make a Sonic game for Wii U as they'd choose 100% without any meddling I MEAN assistance from Sega. Work on bigger things if all goes well.
4. Get Hirokazu Yasuhara (already at NST), Naoto Ohshima (at Arzest), and Yuji Naka (at Prope) to all collaborate on a new mascot platformer with a FULL budget for Wii U (or 3DS) retail, EAD Tokyo can provide any assistance necessary. If possible I'd just buy both Arzest and Prope and either keep them separate or merge them into a New Sonic Team of sorts, Yasuhara can choose if he wants to stay in the US (he was always in the US since Sonic 2, seriously, he must prefer it) or whatever and just have him have full communication with the others. You have the greatest minds of Sonic, use them.
5. Buy more devs, starting with the closest in the west, Monster Games and Next Level Games being first on the list, should've happened years ago.
6. Never refuse a localization of an in-house game, you never know what could be the next big hit, this would include Captain Rainbow, I'd try very hard to keep all the charm and ahem, themes in the game unaltered unless it was REALLY necessary.
7. Allow more 3rd-parties to make your veteran IPs, like consider Platinum or Treasure for Star Fox, or Camelot for DK for instance (as an alternative to the "New Rare"), this would also help with the next...
8. Droughts = illegal at Nintendo. Well, at least what is humanly possible.
But as we have a fucking warchest, we'd use it to fund more games from 3rd-parties, and put more resources (likely from in-house) to assist said games to finish them for when there are gaps in the line-up.
7. TRY to fund versions of the BIGGEST games, this includes GTA V, and COD if Activision ever backs out, get the games that causes nations to go a buzz, those are vital for consumer perception.
8. Adding to 7, also try to go after ANY large game that's not Wii U-bound (like Bioshock Infinite, Borderlands, whatever), but to be fair this has to be early enough in development, because people will not appreciate late ports AHEM.
9. Next-gen, try to not reinvent the wheel with expensive controls but instead refine, while leaving financial room for beefier tech to try to be on par with the generation it's going to be part of.
10. A lot of these can apply to 3DS as well (but it is doing rather well at the moment at least in Japan), but again, Get COD by N-Space on 3DS, try to get AAA PSP games to get ported over (I know I said people don't like late ports, but I might make VERY few exceptions), one of my picks would be Peace Walker 3D with Naked Sample graphics, OH YEAH!
11. Revive more dead projects Bayonetta 2 style, first being Cry On by MarvelousAQL and Mistwalker for Wii U. Maybe also getting Level 5 to revive Ushiro on 3DS.
12. How about getting ads in at least NA to go back to their utter charm of the N64 era? Smash 64 anyone?
13. And just some of the other games I had in mind; Pokemon Stadium 3 on Wii U, Sonic Adventure 3 on Wii U in addition to the EAD Tokyo game, the "New Rare"'s DK game will be essentially DK64 2 called Donkey Kong Continent, of course they'll also make Diddy Kong Racing 2 (if possible I'd get Kirkhope as DK and bring back Kevin Bayless for Diddy and whoever else he did, Seavor was Bumper and of course Conker, bringing back as many voices as possible), also I'd have the team reboot Dinosaur Planet as it was intended. Viva Pinata 3D if I buy that which will be an Ultimate Edition of both games in one, a Wii U version can now happen as well.
14. Oh and of course more new IPs from all devs and not just regulated to small eShop games no, BIG retail new IPs.
15. Get Insomniac after they're done with EA to make a brand-new platforming IP for Wii U that's owned by Nintendo, make it the same caliber as A Crack In Time. Also try to get Activision to license out Crash and Spyro to also let Insomniac make brand new entries in whatever they deem worthy, so long as it's the proper team and not the secondary All 4 One team... Alternatively, round up as many former Naughty Dog, Insomniac, and Sucker Punch devs together for the same purpose.
That's it at the moment, I didn't really talk about some other game ideas that I have, but I can post those later.
Edit: Added more from later posts into this one.