|This article or section is about game content which is currently in development at Creative Assembly. The information here is not final, and may change rapidly.|
The campaign has also been informally labelled "Immortal Empires" by some community members.
The campaign will combine all playable content from all 3 games in the Total War: Warhammer series, so that players can play with all playable races, factions, lords and units from Total War: Warhammer, Total War: Warhammer II and Total War: Warhammer III.
This works similarly to Mortal Empires in Total War: Warhammer II, which combines content from both the first and second games.
To have access to this campaign, players will need to own all 3 games on the same store (eg: Steam Store or Epic Games Store), although the game keys themselves can be purchased on any store. For instance, you can purchase the games on Humble Store or Fanatical and receive a Steam key, to own the games on Steam.