Board Thread:Warhammer 40k General Discussion/@comment-6767898-20130227013545/@comment-7186329-20130407144533

If the primarchs return, even with a few missing limbs or crippled, which is undeniably possible, If they have not been corrupted then their respective chapters, and succsesor chapters will welcome them. The primarchs mind is after all their greatest asset, therefore if theiir intellect is intact they could still lead an army. I am not even going to go to how difficult it is to actually cripple a primarch. An example of that is when that demon smashed the legs of Sanguinus and two days later he healed, or that Guillmans` skull was bashed on the side with a mace by Lorgar, and he still survived. And even if they are greivoulsy wounded, i imagine they would get the best of bionic implants and healing available in the Imperium, Dorn for example is missing atleas one hand, and it will probably be replaced by a master-crafted augmented limb.

No doubt there will be a lot of questions and suspicion, but once it has been confirmed that the primarchs are themselves, then the Inquisition or the High Lords would have to be extremely foolish to create strife between All Adeptus Astartes chapters and the Imperium. And even if ,as you say, they might be then the primarchs could still rally all chapters and send them on a campaing against the enemies.