Just get the compilation for Gamecube and play it on the Wii, it's exactly what a Wii compilation would have been if it would have come out. All they did for the Mario one was re-release All-Stars, I doubt they would have bothered to make a new compilation for the Wii when they already had one they could have lazily reused instead.
If anything they'll wait until their new system comes out before releasing a compilation, it would force people to buy it just to play the games again. No sense in making the Wii seem too awesome or nobody would bother upgrading to the next console. I still doubt a new compilation would happen though.