Frogger on 20 October 2015
...It can't. It'll definitely have the Wii U's VC line up from launch. I'm still unfortunately not sure about the 3DS, however. There's reason to believe it won't appear at all, such as the complete drop in support in that regard for nearly a year.
I think they'll continue from where the Wii U left off, and then just add GB(C) to the NX VC later. That being said, I think you'll still have Wii mode, so technically the Wii's VC will be there, but that will primarily be there for digital Wii retail games and the eventual GCN VC which will likely work by the same means.
