softmod will NOT effect the wiiu. however, the wiiu update did mess with the aspect ratio on the vwii mod. there is a temp fix in the first post of this thread.
nintendo generally doesnt scan for modded consoles. they never did with the wii. i had my modded wii online since 08 and never got banned for it being modded or me playing mario kart wii off my hard drive (probably one of the 3 games i played on the wii).
so far, the softmod on the vwii has NOT been affected by wiiu updates, sans the aspect ratio bug.