Board Thread:Warhammer 40k General Discussion/@comment-6134883-20130417202949/@comment-7186329-20130507183918

No, it will happen once a mediator, like Roboute, or The Emperor steps in to resolve their differences and tells them they need to work together and all are equal before Him. The reason for internal conflict in the first place was that each thinks to be superiour and closer to The Emperor than the others.