A new Paper Boy, a new Cruis'n or Outrun, a sequel to Bodycount, a new Samurai Shodown, a game by Splash Damage, Shadowgun Legends, The Secret World or Hellgate: London with mods, and a decent RTS with touch screen controls enabled.
Overwatch and undertale honestly aren't too far fetched and would be amazing experiences on the switch, but more realistically I'd lime to see some new ips from them or at least another Zelda game