>>32379392I think the most likely out of those three possibilities is Boomburst, but I still don't see them giving it to Primarina as GF probably thinks it's overpowered, and maybe they are right. It would be absolutely monstrous in doubles.
It's not like they haven't introduced broken gimmicks for starters before, though, so who knows.
It really does feel like Liquid Voice is made JUST for Boomburst, after all, and I find it hard to believe that they didn't at least give it some thought. It's a shame that it will probably never happen because Primarina has 126 base Special Attack.
Liquid Voice getting a buff is not impossible, I guess, the -ate abilities have been changed slightly going from Gen 6 to Gen 7, so it could happen.
The third option would be cool but I don't see them introducing a new move just to fix an hidden ability.