The Kalos starter trio really is the only full starter trio to make it as transferable to SV via HOME, based. Wonder if like Alola trio in SwSh the Kalos trio will be in SV's DLC campaign as special gift Pokemon in some way. Iirc the entire Alola starter trio was transferrable to SwSh via HOME and then they were made obtainable in-game via Isle of Armor's Diglett quest, wonder if the Kalos starter trio will be obtainable in-game in SV's DLC area in a similar manner possibly in the first expansion area they release.
And then I speculate that the remaining members of the Kanto, Johto, Unova, and Alola trios may become available in the second expansion of the DLC, like what happened with Hoenn starter trio with respect to Crown Tundra in SwSh (unobtainable in base game, added as obtainable mons in Crown Tundra DLC).