According to this N-Europe report, a Wii version of Punch-Out!! is being rumoured for E3 by Brit mag NGamer. It’s going to use the Balance Board, apparently, but aside from that there are no other details there: you’ll just have to wait.
If this and Animal Crossing get announced, there’s going to be a scene reminiscent to the bit in The Day After Tomorrow when the giant tidal wave drowns Manhattan, except it’ll be in LA and it’ll be a tsunami of fanboy semen.
Picture it. Go on.