Board Thread:Warhammer 40k General Discussion/@comment-25618639-20141119150740/@comment-9618659-20141217151050

I think that should we see the loyalist Primarchs make a comeback, we would be very surprised, since it would be of an EoT level. So Far, Russ, the Lion, Vulkan and Guilliman are almost a given. Corax would probably return too, alongside Russ, since both of them departed to the Eye of Terror at the end of the Scouring. And we could have some surprises (The Khan, freed from the Dark Eldars to fight once more and maybe Omego or Alpharius, if one of them remained loyal to the Emperor despite the Long War. I honestly wouldn't put it beyond GW to give us such a thing).

Now, it would be quite hard for the Primarchs to change the course of the Imperium as it is, even with the Astartes following them en masse, because it would suppose the end of the Codex Astertes system and the return of "Legions" (with all the difficulties steming from the many cultures that now exists among the Astartes). Obviously, we would see a War of Faith of epic proportion, because a Primarch such as Leman Russ wouldn't appreciate the Ecclesiarchy and could act too rashly -or maybe the Wolf King would surprise us, having matured from his Blood Claw youth to the state of Long Fang, and it would be a disgusted Vulkan who would fan the flames of war ?

Anyway, it seems obvious to me that the Imperium would face it greatest challenge in the mightiest civil war since the Horus Heresy, but  think that this turmoil would actually serve Mankind since it would grant Cypher the time to achieve his goal (if it isn't a nefarious one, of course). Still, the cost would be greast (I can see the Eastern Fringe falling, either to Necrons, Tau or Tyranids in the chaos of the Civil War). And since there is so many divisions between the Imeprial institutions, I could see more infighting than a mere Primarchs vs Ecclesiarchy :  the branch on Terra could side with the "traditionalists" while the one on Ophelia VII could side with the Primarchs, accepting a reworked Creed probably devised by the Guilliman.