Creative Assembly just announced a new Legendary Lords Pack that will come out for Total War: WARHAMMER II on December 3rd. The DLC adds two legendary lords, one from the Skaven and the other from the Wood Elves, as well as the factions they lead and new units to these two factions.
Source: N4G PC Total War: WARHAMMER II The Twisted & The Twilight DLC Announced Frags of War