Never on 16 December 2014
NSMB and 3d world really aren't suited to online play. You need to be in slapping range of your buddy for when they run ahead forcing you to be bubbled and certainly if they knock you to your doom.
They would have to rework how the multiplayer worked for online multiplayer to be a good idea. It just doesn't translate well into those games, as it currently stands, even if you only play online with people you know. It would be a unplayable broken nightmare with strangers.
