Would the Wii even be able to handle a game like Skyrim?
It doesn't matter, there won't be any Wii version:
http://www.gamesas.com/index.php?/topic/1169126-possible-mac-port-in-the-works/
There's nothing currently planned. Game is coming to PS3, 360, and PC.
That thread's about a Mac version- but Gstaff pretty clearly swats down any versions other than the same ones Oblivion had. PC, PS3, Xbox 360.
And Todd's already shot down non-Wii motion control, so there it is.