OK, I think that this was once here, but cant find it. So I wanted to relive the idea. So, it is and AT HH. Yes, a AT where Horus turnes. But wait what is the difference? Well, those who follow him. Thus I wanted to change a few bits about the primarchs pasts and swich most of their roles. the end is the same, Horus is dead, but since Sang and Dorn joined him, the ending goes a bit bad on the IoM. The Emprah is more dead than in the original HH, he aint dead, but closer to it. So, the IoM loses more planets than in the real HH. The Eldar even take some worlds back.... could even be an Neo Eldar Empire, who knows. So:
Luna Wolves - same traitors, same loyalists, they become the Sons of Horus, since Horus doesnt die, chaos undiivded
Blood Angels - there was a part where Horus sent Sang and his guy on a Khorne worshiping world, thus making the BA fall to the worship of Khorne, they are tho able to hide their true siding till the end
Imperial Fists - turn traitor as well, they are also inside the Imperial Palace with the BA in the end and then turn on Big E fully, chaos undivided
Ultramarines - i thought that Guilliman could get visited by the Cabal, like Alph/Omeg. , they would go to chaos undvd.
Dark Angels - they would replace the WB, being the first heretics, Luther could make Horus fall to chaos like Erebus did, and the Lion falles to chaos udivided
Raven Guard - since Corax is a good psyker and Tzeentch also known as the Raven God (at least in Fantasy), they could turn to him
Space Wolves - get defeated by the TS, Magnus warnes the Emperor, Russ after defeat turnes to Chaos (could even by struck by a plague of nurgle, making the SW plague marines)
Iron Hands - Could fall to nurgle or CU .... would be awesome if Ferrus gets a hammer, killes fulgrim, and get`s possesed by a Greater Daemon
White Scars - slaanesh, the guys like speed face it
Word Bearers, Iron Warriors, Death Guard, Alpha Legion, World Eaters, Thousand Sons, Emperor`s Children, Night Lords and Salamanders stay loyal
OK, this idea has been in my head for some time, idk, and if this idea was really once here, then let the autor contact me, since i like the idea!