I'm as disappointed as everybody else is, but I wouldn't even begin to contemplate Wii's downfall or my selling of the system.
Through rumors, leaks, and common sense we know stuff like Kid Icarus Wii, Pikmin 3, etc. are in development. We also know that the Mario and Zelda teams are "hard at work" on new games.
I'm just baffled at no teaser trailer, announcement, or anything. I mean, God of War III got away with just having a pre-rendered FMV announcement and that wasn't really anything to get excited for because the game wasn't shown off.
I also think people who downplay Animal Crossing are going to get snipped in the ass. Animal Crossing is as hardcore or casual as one makes it out to be. I mean, the game is so simple and relaxing in premise, but the fanbase is huge.
Then I go check out something like GameFAQs and see how populated the board is.
I think Animal Crossing is like Pokemon, in that they're both easy to go through the motions but hard to "be good" at. You can easily tell the difference between people who spend time playing the games and those who just casually play them and let them sit on their shelves after.