Predict the next expansion name.

[Edax]

Actually the word Stormblood comes very early on xD. and the said "Storm of Blood" is referring to the rising of the revolutions in Ala Mhigo and Doma,not an actual literal storm filled with blood.

Heck the lyrics for the dungeon boss theme does mention "Storm of blood" in it if you look up the lyrics

Huh, not quite as poetic as Heavensward, which had the WoL at their lowest point, looking heavensward in the very first cutscene and the word ended up having multiple meanings.
I guess this expansion was just another word for Bloodbath, which frankly could describe every single Final Fantasy game in the past.