Pokemon Sword/Shield will not feature all Pokemon - Just the ones in the regional dex.

[Super_Boom]

While personally this doesn't affect me, as I prefer to use the in-region Pokemon for my team anyway, and only transfer pokemon across gens as a bonus in the post-game...I can see why people would be upset by this. Its pretty lame to not be able to bring your favorite teams over, especially if you're really involved with the meta. Hopefully this gets sorted out in future versions of the game.