The only big titles that could have a chance to come out for Switch this year and haven't been announced yet are Pokemon and/or Smash. Whatever else is shown won't make it before 2018 so there is nothing that could be a surprise for 2017 as far as first party or even third party games go that can make the difference. Same goes for PS4 and 3DS with things being even more clear there. There can be good estimates for hardware and software YTD sales after E3.
Chris, i think there are chances for Animal Crossing Switch to come out this year actually.
Nintendo mentioned that Animal Crossing mobile is coming this year right? They usually had some product released together/close to the mobile release before.