Age of a Thousand Thrones

The Age of a Thousand Thrones is a dark prophecy among the vampire clans of the Old World. It details the rise of one of them as the overlord over the rest of their kind.

History
The prophecy originates in the visions of W'soran, who recorded them during the fall of Lahmia. Only a few written records survive, among them the Scrolls of Zandri, rediscovered by the Tilean adventurer Giovanni Lafranchi. The vampires that are knowledgable about the prophecy believe that it will be triggered by a dark miracle or spell of enormous proportions. Afterwards, one of their kind, the Champion of Night, will rise above the others after lifting the curse of the Old Gods. Only thousand vampires will survive in the new age, each a god unto himself, and mortals will willingly pledge themselves to their new undead overlords.

Each bloodline has their own theories what will lead to the events that result in the Age of a Thousand Thrones.
 * The von Carsteins believe that the bearer of the ring of Vashanesh will rule the rest of their kind once Ptra has been banished from the sky.
 * The Lahmians believe that by recreating the original Elixir of Immortality, the other vampires will be beholden to them. To this end, they search for avatars of Sigmar, who learned Nagash's secrets when he donned the Crown of Sorcery.
 * The Strigoi believe that Sigmar was a vampire, given the Red Kiss by a Strigos vampire in service of Nagash, and that by reuniting the blood of the five bloodlines in a chosen vessel of Sigmar's people, the Champion of Night will rise.
 * The Necrarch have no unified theory. Instead, each Necrarch believes that he is destined to become the Champion of Night and conducts their own research.

The Blood Dragons do not concern themselves with prophecy and most are unwilling to aspire to leadership over their kind, instead focusing on the task their progenitor gave them.

Source

 * Warhammer Fantasy RPG 2nd ED -- The Thousand Thrones
 * pg. 4.
 * pg. 158.