What Nintendo needs to do is to prove that different gaming genres can be popular on a Nintendo console.
Bayonetta 2 is a good first experiment. However, it's not enough. They need a TPS and FPS they can showcase and other types beyond that. They need to go to developers and make an offer for an exclusive, or failing that, offer to subsidize a Wii U version. They need to swallow some of their famous pride and really, really push a third party title. They need to pay for advertising, they need to cover possible losses, and they need to offer support that exceeds what Sony or Microsoft is doing. Nintendo is far removed from the catbird seat they once occupied.
They've got to prove that putting core titles on the Wii U can be successful. If they can manage that, then they've got to be ready to welcome publishers like EA back with open arms. Some rabid fans might object to that, but we're talking about business, not high school drama.
As far as I can see, the initial burden is on Nintendo. They have a lot of work to do and no right to expect third parties to do it for them. If they pull out all the stops and genuinely make a real effort, I'll be rooting for them. If they're simply happy to produce a Mario-box, then so be it.
Bayonetta 2 is going to be a big deal. The entire industry is going to be watching very closely. Nintendo had better promote the hell out of it, and not by having Bayonetta appear in Mario & Sonic at the Olympics or whatever.
If Nintendo does all that, then the next burden will be on Nintendo fans to buy those different genres.
