Delterius
Arcane
That's already over half the franchise my dude. And do remember, the shift from humans worshipping a God with capital G fighting Orcs who summoned demons from Hell with capital H actually started with Warcraft II.Retcons are only bad when used over and over again, like they did from Warcraft III onward. If you retcon something minor it should not be a big deal. Turning Orcs into noble cool dudes on the other hand is dumb shit.
That said. There's a difference between borrowing from the father of modern fantasy and literally shifting words around because you just suddenly lost the license to IP you used to make your first game. Warcraft as setting didn't exactly have a novel start. That was the beginning of a fun, dumb schlockfest franchise that sold millions.
Knowing the difference between good and good 'enough' is the healthy distance between laughing with all the dumb shit that Blizzard writes or still being pissed off at all the retcons, inconsistencies and moments of shittiest decisions that peppers the story. There's still people who froth in the mouth that the Eredar/Draenei connection was retconned in TBC. Or that Deathwing was turned into a big dumb dragon. And that Medivh's son exists. Or that the entirety of the Night Elf lore exists. That Pandaria exists. That the Scourge was turned into the ultimate unstoppable evil, only held back because Arthas is a retard who likes to play with his food. That Illidan was resurrected because of a poll on twitter. Etc.