I think there's a 0% chance that happens. Seals are dead. (Personally, I'm grateful. No idea why people remember them fondly!).
Main thing I want to see is useful utility so there's actually a reason to bring a ret paladin to something.
-Blessing of Might as battleshout, maybe Blessing of Wisdom as Intellect (though I would prefer if they just removed these buffs altogether)
-Instant cast repentance that doesn't generate combat (like imprison) so you can use it as a skip. Making it a soothe would also be incredible for raging weeks.
-Integrate some of the cooler PvP talents somehow
-talent WoG into a cleaving heal like BFA so it's actually useful outside of PvP
-Make shield of vengeance not a complete joke
-Talent for wake to let it have a proc to auto delete demons and undead again
I don't know, personally I think the spec plays well but doesn't really have a place in the game unless it happens to be overtuned. Other paladins bring auras and Holy is nearly always meta. Ret is a "healing hybrid" that does almost no healing. Classes like DH and DK have far better self-healing and survival tools, and ret survivability outside of bubble is atrocious.