I don’t even think that’s likely- Darkoath don’t fill the same niche, and there’s really not many ranges left to update to AoS:
CoS (Assuming Dwarfs and Elves stay) need those done, but that could be handled by a 2nd Wave.
Bonesplittaz, who I could see going along with the end of Big Waaagh! since it seems likely Kruleboyz and Ironjawz get their own Vanguards and Battletomes.
Skaven, who are getting theirs in a few months.
Ogors, who it would shock me if they were more than 2 years out from theirs.
Beasts, who are the only ones rumored to vanish, but have faction terrain, endless spells, and could probably be AoSified fairly easily by leaning into mutation and wild monsters.
The only reason they would be going would be that the TOW team had enough influence to make it so, or GW wants to further bloat the second largest battletome in the game.