Don't know why people are saying Monster Hunter when Generations Ultimate is on Switch.
Biggest surprise for me personally is Pikmin. I'm not a fan of the series, but Pikmin 4 was announced 5 years ago now and 3 should have been really easy to port, so it being a no-show is pretty surprising. Series like Star Fox and Paper Mario came our late in the Wii U's lifespan and had pretty mixed reception, so I wouldn't have expected them to show up before now.