I still kind of wish the true final battle with Zenos proper would be him using an Othardian jewel as the font of a primal transformation into Amaterasu. I know it's far less likely to happen given recent developments, but if Tsukuyomi can take the appearance of a woman (Yotsuyu) in FFXIV when many depictions of Tsukuyomi are often male then Amaterasu being male in form within the game shouldn't be much of a stretch. Again, wishful thinking, I know...