Yeah, use NSMB2 as the "new" design. That'll work.
3D exclusive to 3DS version, HD exclusive to Wii U version. Stages made onn3DS can be playable on Wii U, but not vice-versa.
^That should be a good enough compromise.

I WON A BET AGAINST AZUREN! WOOOOOOOOOOAAAAAAAAHHHHHHHHHHHHHHHHHHH
:3







