Hear me out, but you know that shit in the Emerald Nightmare when Illgynoth says that shit about "5 keys to open your door, 5 torches to light your path"? and everyone thought that was the five pillars of creation?
Wellllll....what if the 5 torches are the 5 World Trees and once the horde burns Teldrasill we realize that (with the exception of the wound in silithus) Azeroth hurts soo much that it wakes the Old Gods. Specifically Nzoth and Ysharraj!!! THEN WE HAVE TO BURN THE OTHERS TO WEAKEN THE OLD GODS
Yes I realize I spelled some names wrong. Apologies.