I see your point, I'm just saying it's still too early to call.
Let's see what happens at TGS and E3 because as of now good multiplatform (COD) and good exclusives (Goldeneye, Epic Mickey, Just Dance(?)) are being made for the system. That will be their holiday push games, price, family fun at only $250 with 2 games packed in. Their still banking on software and price, the Nintendo way. 3rd party support may not be robust but unlike the GC it does exist.
We don't really know what Nintendo has planned for the Wii. Unlike usual Nintendo they've swamped us (for them anyway) with info about the 3DS. Yes they originally wanted a holiday release but they probably knew internally and didn't want to scare investors. And we know the 3DS is going to be a success, hopefully the Wii can piggyback that success. Kingdom Hearts 3D is going to lead into Kingdom Hearts 3, and the Wii gets none of that? This is not the GC, even if sales are slowing, they are still good, and don't forget the 360 has a year on it, and the Kinect looks pretty cool, and the PS3 has more power and 'hardcore' games, it has disadvantages and is keeping up.
Let's see if Nintendo can boost sales like they say are trying to do. They're still in the game, and they still have things to show us. If after TGS and E3 their is nothing new for Wii and it's all about the 3DS then obviously expect Wii2, but there are good 3rd party games for the Wii that have recently come out/been announced. I'm asking what's the need for the panic? The sales and games are there right now, why doesn't the bode well for the future? Especially for games, the Wii isn't at PS2 levels yet...