So I was thinking about the Legion of shadows "typo" from the Legions of Nagash announcement, and this new email that whent out talking about an an ancient nemesis.
Now what if Legion of Night is the soul blight rules with our boy Manny
And Legion of Shadows is Vlad reborn with a new on foot model.
So new Grand Alliance death, Legion of Shadows, Legion of Night, Legion of Sacrament, Legion of Blood would be the 6 Allegiances.
It would make sense that Nagash would want another General more suited for war.
Or someone actually made a typo.