Honestly I think Nintendo should do what Sega did. They would make a killing if they went multi-platform and we could all play Zelda without having to invest in a console that gets no 3rd party support.
At this point Nintendo just needs to pull away from the console race and focus on their real money maker, the 3DS and handhelds in general. They should port their titles to MS and Sony and just focus on their handhelds. I love Nintendo, always have and always will but they have almost zero third party support at this time for the Wii U and it isn't looking to get any better for them.