Okay, here's my pitch for Wii U controller support on vwii/Wii (I'm not sure if it goes both ways but but especially vWii)
As someone who owns a wii U with pro controllers, Me and a lot of other Wii U owners could benefit from the ability to use our pro controllers in Wii games, the same we we can use them in Gamecube injects. As far as I know, the controllers have limited use in the vwii's homebrew apps and 8bitdo's wireless connecter seems to do the trick, but if there was a way to spend less money and do it with simply making some homebrew that imitates either a Gamecube controller or a connected classic controller, that would be sweet. I don't think anyone should go out of their way to buy 4 more controllers if it means you'll only use them for one variety of play, especially when you have controllers that would be perfect for the game you're playing on (also since Gamecube controllers are a rarity) which is why I believe this will further benefit the community not just on an individual convenience level, but also showing that the Wii U/Wii is a behemoth when it comes to multiplayer accessibility.
There's also a plethora of games that would benefit from this:
Castlevania Judgement
Smash Bros. Brawl
Tatsunoko vs. Capcom
Guilty Gear XX Accent Plus
Dragonball Budokai Tenkaichi 2 & 3
GoldenEye 007
Sonic Colors, Unleashed
Fire Emblem: Radiant Dawn
Rayman Origins
the COD games
Valhalla Knights
Rune Factory Frontier
Zangeki no Reginliev (for those who know)
Shiren the Wanderer
Harvest Moon
etc.
So many games could get the attention they deserve again, just by giving them this level of accessibility. I truly believe if we give this attention, more people will start going for a Wii U over a Wii for backwards compatibility. Almost any game runs well with Wii U pro controllers. Maybe we can do something like a Bloopair for vWii? I don't know if nintendont operates on Wii VC injects but if it does all the better.