This would be insanely good. Literally.
I just want more Legion Wars content.
It’s a cool setting, freshly exiled traitors turn on and brutalize the SoH, led by the legion that the Luna Wolves mentored. It’s a shame all we have of it is two ADB books (where all his fetishes became obvious) and one Fabius Bile audio drama.
So it’s perfect for a game. The protagonist is a SoH Chieftan, company massacred by purple tards, left drifting in the void to be torn apart by demons and “saved” by a presence who gives your character, formerly a True Son (has Horus’s face and rejecting the gifts) the “tools” to get revenge, you have a psychic awakening.
Then it’s straight into the wars, building a proper Undivided warband to resist the Emperor’s Children. Ending with the reveal that no, you are not an Argel Tal brand of possession where your daemon is Venom. No, Be’lakor is making his appearance and wants to make some of the “new arrivals” his puppets and beat out the soon to emerge Warmaster as champion and you are no longer of use as an independent puppet, time to become a skin suit.
Except your legionaries aren’t “dominated” thralls and back you, because you may be a bastard Cthonian, but they’re not bending the knee to a daemon and you resist the daemon. Your army vs a horde of Neverborn and Be’lakor as the final boss.
Post-game ending (like Shadow Wars after it was revised) is your character joining the Black Legion.
That’s my 40k game pitch, playing like Arkham rather than SM2’s Dark Souls knockoff because Dark Souls ruined gaming.