Dead Space and Resident evil umbrella/darkside failed because they are rail shooters. The design is for the most part safe. The developers of DSE wanted to make a more casual friendly dead space, thus alienating the traditional core of gamers. Making a rail shooter after making over the shoulder games for PS360 is a slap in the face. What makes matters worse, after sales flounder they blame the consumers.
Madden 2010 obviously failed b/c of the cartoon feel.
Red Steel2 failed b/c of no replay value. I expect it to have legs at a discount price, especially when zelda includes wm+.
Everytime the 3rd party developers put out disappointing stuff and blame the core base, that leaves a bad taste for wii owners. Stop casualizing games and see what happens.