From what I hear it's coming to the 360, so why not?
Microsoft owns the 360, and they made an exclusivity deal with Mojang so it wouldn't go to other platforms. I think it's timed though, so we might see MC on the Wii U in a few years.
Skyrim would be awesome on the Wii U! Though we still don't know what the first batch of games for the system will look like, so it's kind of hard to guess how improved the graphics would be if it was ported to the Wii U.