Going off of the assumption that the NX is both a home and handheld console/a new brand for Nintendo that bridges home and handheld, what would you like to see from its Virtual Console service, in terms of systems supported, etc?
I want to see the GameCube get support, while they should get Sega back on board and release Master System, Genesis (CD and 32X), Saturn, and Dreamcast games for it. All around, they should also work towards getting a huge library of games for VC like they did with the Wii, and not with the Wii U.
Personally, I think that Virtual Console games should lower prices. They're too high. Especially when you can just use an emulator with more games supported for absolutely free. If I could get my way, these would be the NA price points:
NES/Master System/Game Boy/GBC - $2.99
SNES/Genesis/GBA - $4.99
N64/Saturn - $6.99
GCN/Dreamcast/DS - $9.99
Wii - $14.99
If anything, I firmly believe that there should be a subscription feature for VC. But that won't happen.