Graven Games gives us a look at the new Nagash book in this new review article.
From the post:
All across the face of the Old World the dead are uneasy in their graves and the winds of Shyish gust wildly. Usirian, lord of the Nehekaran underworld is dead and taking his place is the Demi-god Nagash, first Necromancer, the dread lord of Nagashizzar, the enemy of life itself and potentially the savior of the Warhammer Fantasy world. The world is ending and every single race, every faction, has been called to arms for the last great war. The End Times are upon us.