If the following list is accurate, the wii has a really small percentage of NES games on their VC:nes wii vc games
Only two new NES games listed for 2012? It sounds like Nintendo really hasn't been able to acquire a lot of rights. I'd expect to see might and magic, ultima, and dragon warrior on the list.
It looks like they've taken out several games they use to offer, after losing contracts with data east and irem, as well as the teenage mutant ninja turtles series, because of problems with viacom. Turtles in Time was a pretty awesome SNES game back in the day. Losing the R-Type (by Irem) series has to be a big loss as well.