How do you define fail? Doesn't sell a million or more copies?
I would suggest that a game is a success if the developer is making a sequal.
And just of the top of my head: NMH2, BoomBlox2, and I believe they are already talking about a sequal to DeBlob.
There are many more, but here are a few to show that this has not happened to all games in the past on the Wii.







