I think if they are going to do ports, then they may as well just port the major Wii U games.
Smash, Mario Kart 8, Splatoon, Zelda BOTW, Mario Maker, Bayonetta 1/2, DKC: TF, Xenoblade X.
It's not that many. Lots of people didn't get to play these games. Mario 3D World isn't neccessary because they do have a new 3D Mario.