Editing World of Warcraft (section)

===The Burning Legion===
A militarized demonic army created when Sargeras, a titan tasked with defending creation, saw the ever-respawning, ever-dickish, and ever-hungry nature of demons and went nuts to embrace nihilistic violence.  Now they systematically unmake the multiverse to undo the metaphysical flaw that allowed them to exist in the first place. Azeroth is the only known world where they failed.

The aforementioned flaw turns out to be the Void, but demons were a secondary problem, not the problem: the Old Gods corrupting fetal titans was. Now the universe has to be unmade without the Void, but Light + Void = matter with fel as a by-product of that, but demons hate the Light too so no idea how that works.

Azeroth is so far the only world to ever withstand one of the Burning Legion's invasions. They did not take well to this and have been plotting to get even, but since just marching in failed they made plans to create another army to soften up any defenses that could impede them. '''Revenge Plan A''' was the Orc Horde, which nearly worked until the Orcs lost, and settled down and became among the defenders of the world they were supposed to destroy. Oops. '''Revenge Plan B''' (their second invasion) was the Undead Scourge, led by the Lich King, which succeeded in obliterating the human kingdoms of Lordaeron and Alterac; almost obliterating the elf kingdom of Quel'thalas; corrupting the Sunwell; forcing the human kingdoms of Gilneas, Dalaran, and Kul Tiras into hibernation; sapping Stromgarde's military forces just enough for it to be destroyed by ogres; and generally making a mess of the only organized military force in the eastern hemisphere. By the time they were done, Stormwind was the only human kingdom (out of the original seven) still in existence and in contact with the outside world. This plan hit a snag due to three factors: an extremely large faction of Scourge, led by Sylvanas Windrunner, broke free from the Lich King's control, signed a pact with the Horde, and became a resistance force just as powerful as the kingdoms it replaced; Lich King freed from its prison after Illidan (who was forced to re-fulfill Kil'jaeden's request to destroy the lich king after his first failure) beaten in a duel against Arthas and allowed him to merge and become the Lich King's host; The Invasion of Kalimdor was going well until in the final phase when Archimonde the defiler was met with the combine forces of night elves, humans and orcs, who were buying time for Malfurion to dealt the final blow against Archimonde and made the invaders run between their tails with their leader dead. '''Revenge Plan C''' was to funnel their forces through Outland, which became a portal hub when Ner'zhul made it into one to escape the Alliance. Retroactively, this is not seen as an invasion because they never made it to Azeroth in force. '''Revenge Plan D''' was just to show up again using the Tomb of Sargeras (a second portal was buried there and sealed, and they went through one of two Gul'dans before they managed to open it).

Also, for another retcon, one of the higher-ranking types of demon in the Burning Legion, the Nathrezim, turn out to "actually" be the agents of a death titan-equivalent who's playing 5d chess trying to infiltrate and defeat the other cosmic forces and screwed some of them over.