Im calling it right now. Blizzard toying around Lich King's names.
First it was Arthas = A.
Then it was Bolvar = B.
So, im pretty sure the cycle will continue after Shadowlands. And its pretty much given that Sylvanas will most likely be defeated.
Given the current trends of powerful woman characters, is there better character to finish Sylvanas, also connected to both Arthas and (potentially) Bolvar, and also being Undead?
Wait for it.
Its CALIA MENETHIL = C!
Callin it right now, Calia Menethil will take the reforged crown of the Lich King and will become the Lich Queen, probably, along with Bolvar, her previously unnamed husband.