I don't think people understand how much potential the Switch has. First let's analyse Nintendo's First Parties:
Monolith Soft is currently working on the sequence to one of the most aclaimmed JRPGs of last generation, and it's looking fantastic so far. That's not all, considering the Switch will have a lifespan of 5~6 years, they'll probably be working on another RPG project in the future.
The Mario Kart team is working on Arms right now and they'll release this month Mario Kart 8 Deluxe. What does it mean? That they won't need to bother doing another Mario Kart, so after Arms I think we should be expecting an entirely new IP from them, or perhaps an old one like F-Zero.
The Zelda team is working on the DLC and after that they'll probably work on the next Zelda and considering they already have the engine of BotW, it's probably going to be faster to be released. And Nintendo asked Aonuma to work on a new IP, he said he wanted to do a game about thiefs, so perhaps we also should expect something from him.
The Mario team is working on Odyssey, so they'll have the entire generation to do the next Mario or work on a new IP.
Splatoon team is probably going to make a new Animal Crossing after Splatoon 2.
Game Freak is probably going to release 2 or 3 Pokemons on Switch.
Intelligent Systems is also probably going to release 2 Fire Emblems on Switch.
And we should not forget games like Kirby, Smash Brothers, Sakurai's new game etc.
Now for third parties we can expect the next Monster Hunter, Dragon Quest XI and other JRPGs from Square, Story of Seasons, Atlus' JRPGs, Level 5's JRPGs and lots of other japanese developers.
The Switch has a huge potential to be the best Nintendo console since the Super Nintendo.