I think you definitely see 3D Mario and Retro's game if they're ready. They should be close and they have surely been held over for NX. Zelda U definitely gets a port and possibly Smash. I hope/expect a new IP that shows off whatever is apparently unique about the system. Beyond that I expect a hard push to get third party content.
Splatoon 2 and Kart NX I would expect to come a little later.