Luigi's Mansion 3 and Sordensheald are confirmed to be coming, and I'm positive that we'll get the next Smash character revealed, whom'stever that may be. It's also possible that we'll see Banjo & Kazooie showcased with their release date given. We may also get a new Mario game if that image is the tease we think it is. SNES games for Switch would be nice as well.
Other than that, I'm still hoping for all the usual stuff: Mother 3 english release, new F-Zero, Pikmin 4 being confirmed to come out sometime before I die, ports/remasters/sequels of gamecube games like TTYD, Melee and Sunshine, a new game for an old, forgotten franchise like Startropics or Mach Rider, N64 Classic...