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I actually think it'd be somewhat interesting if Nintendo just accepted that Western 3rd party devs treat them like crap and just started to fill out the holes in their software library on their own, relying on multi-plats more for things like yearly sports game updates and that's it.
Heck, I wouldn't mind if Nintendo maybe went back to making their own NBA (Courtside series on N64/GCN), NHL
(NHL Stanley Cup on SNES), and MLB games (Ken Griffey Jr. games).
Outside of like five-to-six third party franchises that tend to be multiplat -- Call of Duty, Madden NFL, FIFA, Resident Evil, LEGO, Sonic, how many even really matter on Nintendo consoles? I guess throw in Assassin's Creed now and what else? Maybe Nintendo would like to see Final Fantasy return for a while before it switches to the PS4/720.
If I'm Nintendo, I'd perhaps look at some cheap options to expand the diversity of my catalog. Contract the Darksiders and Saint's Row teams to make a fantasy-action IP and a sandbox game, since THq is now defunt both teams are likely deserpate for work. I'd maybe look at picking up an underutilized movie license ... perhaps something like Mission: Impossible (could do some neat things with the Wii U tablet with that for sure), so you're not building completely unknown IPs every time.
I'd go ahead and greenlit a soccer sim to compete with FIFA and ISS. Add in an arcade mode that lets you play as Mario and co. Soccer is obviously huge in Europe, Asia, South America, Japan, and growing in North America.
