While they've done a few such things over the years (The Super Mario All-Stars release with upgraded versions of their NES platformers comes to mind), I just don't see them remaking classics for their new console.
I imagine the most we can hope for where upgrades are concerned is for a few obvious choices from the GCN/Wii generations to recieve a HD rerelease like Sony in particular has been doing a lot of lately. The Metroid Prime trilogy, their last three main console Zelda games, and the two Super Mario Galaxy releases (With Sunshine perhaps tossed in) seem like obvious candidates (Or at least ones I'd get behind
). And with how well their New Play Control lineup was recieved, I wouldn't even count on that.
And all their talk when it does come to really upgrading and reimagining their classics seems to center around the 3DS. Remakes like Ocarina of Time recieved (There seems to be a strong push from fans to give Majora's Mask a similar release and some interest from higher up in Nintendo), giving older games like Link to the Past the 3D treatment for their 3D Classics lineup on the 3DS, etc.
I'd be surprised on the Wii U to see any content recieve a significant upgrade from consoles like the Super Nintendo. My money is on any significant upgrading of classics to be the domain of their new handheld while the Virtual Console service is carried directly over to the Wii U from the Wii with emulated versions of classic games and the existing programs and lineup kept intact from the Wii and running via Wii U's backwards compatibility (And hopefully an option to upscale the emulators to HD even though I really doubt they will considering Wii software won't be upscaled and I bet they'll be the exact same emulation programs).
And I bet that's what they're going to do with their GCN and Wii catalogs as well. Sell them digitally in their shop running unchanged via the console's BC with the Wii. Hoping for more in that area like I said earlier in this message, but not expecting it.