The Isle of Armor started development before Pokemon Sword/Pokemon Shield released
Pokemon Sword and Pokemon Shield are kicking off the new Expansion Pass not terribly long after the main games released. The Switch titles launched last November, and we’re now getting the first wave of new content with The Isle of Armor this week. The Crown Tundra will also follow later this year.
Speaking to IGN, The Pokemon Company’s Elvin Glee confirmed that The Isle of Armor expansion started development before Pokemon Sword/Shield released. Perhaps that isn’t terribly surprising since it’s only been half a year.
Game Freak has previously said that the Expansion Pass is replacing what we’ve typically seen with past Pokemon titles offering a new version set in the same region. That means there won’t be standalone releases like Pokemon Ultra Sun/Ultra Moon for Sun/Moon.