Why do most third party publishers ignore the Wii completely ?

[LordTheNightKnight]

"Simply not possible - if it were, then why wouldn't anyone have done it yet?"

That is not how human nature works. People quite often resist doing perfectly possible things.

"The reason could be that a game with wii as the leading platform would not sell as much on hd-consoles."

No basis, unless you can point me to such a game like that.