Spoilers: The Vortex rivalry with Nakai, kept apart from Immortal Empires. No hunter's past beyond the FAQ lines, and no campaign ending.

Who he is in Total War
Wulfhart leads The Huntsmarshal's Expedition. The Hunter and the Beast, a Warhammer II pack, unlocks him. The store page calls him the Huntsmarshal of Emperor Karl Franz and sends his trackers, scouts, hunters, and sharpshooters into the jungles of Lustria. In battle he is a bowman aimed at monsters and other large targets. Infantry buy him time. A Helstorm Rocket Battery has a different target: infantry formations.
The Emperor's Mandate tracks his standing with the Empire and shapes what Imperial Supplies send. Expansion and military success support the expedition. Hostility raises resistance from Lustria. Those are campaign pressures on the Immortal Empires map. They are not a verdict on whether the Empire has colonised the jungle.
Four hunters in Lustria
The August 2019 FAQ says four hunters are scattered through Lustria, and that Wulfhart can track them down, learn their past deeds, and develop their attributes. Jorek Grimm is a Master Engineer, shunned for eccentric ideas, who has gone to Lustria to seek his fortune. Rodrik L'Anguille was a renowned Paladin, then disgraced and exiled, and he is haunted by a past the FAQ does not tell.
Hertwig Van Hal is a physician and Witch Hunter who has travelled far on a quest for vengeance. Kalara of Wydrioth is a Waystalker who left the forests of Athel Loren for the jungles, in pursuit of redemption. Those four lines are the introduction. The missions on the campaign map are where each tale continues inside the game.
Nakai on the Vortex map
The same pack's other legendary lord is Nakai the Wanderer, leader of the Spirit of the Jungle. The store page sets him against the expedition in Lustria and calls him a Kroxigor of the first spawning, wandering since the loss of Tlanxla in the Great Catastrophe. That confrontation belongs to the Eye of the Vortex story. Immortal Empires is a separate campaign, with its own objectives for both lords.
Wulfhart's hunters are companions of an Empire expedition. They are not a second Empire faction, and they are not the Cult of Sigmar, the Golden Order, or Wissenland & Nuln. Franz remains the emperor who sent the Huntsmarshal. The expedition's result is the campaign you play.
Markus Wulfhart: gameplay and availability · More character stories
Sources
- Immortal Empires DLC Ownership Guide — SEGA — support.sega.com
- The Hunter & The Beast FAQ — Total War — totalwar.com
- The Hunter & The Beast — Total War — totalwar.com
- The Hunter & The Beast — Total War on Steam — store.steampowered.com