It is possibel to re-release the first The Legand of Zelda on Wii U in HD?

[BlkPaladin]

It's possible. But they would have to overhaul all the art assets basically reskinning the game. As long as there is a emuator that is able to run NES code, since it is backward compatible with the Wii, that would be the only thing that needs to be changed to make it HD.