Maybe, but Colosseum did add in more Pokémon before FRLG too and RS never outright banned Pokémon outside of the Regional Dex.I don't think dexit will affect the tcg at all. We will still get plenty of variety of mons (even if it's not ALL of them). I can see them putting in mons in the TCG that don't make it into Galar and even vice versa. Because the TCG has always distanced itself from the games. Mainly with typings e.g. Rayquaza being colourless type in Guardians rising, but also with attack names that are more diverse than the vg attacks e.g. Dedenne GXs Static Shock.