Nintendo intends to maintain a steady stream of releases for Switch

[Shaunodon]

Kai_Mao said:

Shaunodon said:

https://www.theverge.com/2018/5/29/17380526/pokemon-switch-2019-core-rpg-nintendo

"But the developer still has plans for a “core” Pokémon game, due out next year, a spokesperson confirmed to The Verge."

http://au.ign.com/articles/2018/05/30/core-pokemon-rpg-coming-to-nintendo-switch-2019

" “Now today I can only tell you of it’s existence, but it’s another game we’re pouring all of our creativity into" said longtime Pokemon director, producer, and composer Junichi Masuda, who is directing the title."

But that doesn't dismiss Let's Go as a mainline game. There is a difference between "core" and "mainline."

http://gearnuke.com/pokemon-lets-go-spin-off-confirmed/