>>43790367There's one of two reasons they haven't announced what Pokemon were returning
Most likely is just so people don't rage pre-release when they find out their favorite isn't a fist pick to put back into the game.
It could also mean we'll get a few more Galarian forms or evolutions, and without letting us know the new roster, we can't even really guess to get our expectations up, and GF have been super stingy with info to keep everything a surprise.
I don't think we'll get a ton, but I do think we'll get a few more with each DLC addition. I think it'll mostly just be new forms, and maybe one (or two) new evolutions