I need to know more before making a decision, but right now I would say Splatoon and/or Smash.
Bet with bluedawgs: I say Switch will outsell PS4 in 2018, he says PS4 will outsell Switch. He's now permabanned, but the bet will remain in my sig.
NNID: Slarvax - Steam: Slarvax - Friend Code: SW 7885-0552-5988