The articles I've been reading seem to indicate it's gonna cost ya
https://www.eurogamer.net/articles/2020 ... expansions
Pokémon Sword and Shield are getting a £27 Expansion Pass which will unlock two big DLCs over the course of the year that include new areas and new Pokémon.
The Isle of Armor is coming before the end of June 2020, while The Crown Tundra is due autumn 2020.
Edit: You got it