Board Thread:Warhammer 40k General Discussion/@comment-37.152.33.225-20131111163502/@comment-8881468-20131218142916

Guilliman is dead just like Sanguinius or Ferrus Manus. The poison was tailored for him and we know how those knives work in the hands of their users.

We also do not even know wether the Lion is loyal or not and others like Russ or the Khan or Vulcan would not really be up to an administrative task (sidenote: tyranny of a Primarch is not even what Empi or the Primarchs wanted)  Council ofn the High Lords was in semi fashion already existing during the Crusade era.