Well we will at least be getting Octopath Traveler, DQ Builders, No More Heroes 3 and Fire Emblem. Metroid Prime 4 is a possibility for 2018. Like MZuzek pointed out anything's possible since Xenoblade 2 was announced and is launching this year. And Retro Studios is bound to have something up their sleeve for 2018 by now.
IMO a good console will have at least five good, non-Indie games a year on average. Switch is currently ahead of the curve with 14 this year, and they started late. So even if 2018 turns out to be a slow year, the system will survive.
I mean, imagine this conversation...
"So you getting a Switch?"
"No, it didn't get but four games this year."
"It has BotW and Odyssey. Fucking get it already!"