Creative Assembly is exploring new ways to integrate the complex political landscape of Warhammer 40,000 into its upcoming Total War title, potentially requiring players to manage their reputation with the Imperium and avoid accusations of heresy. Unlike previous Total War entries where factions represented distinct nations, Warhammer 40,000's factions, such as Space Marines and the Astra Militarum, function more like branches of a single military.

During a recent hands-on session, it was observed that settlement garrisons could be comprised of local Planetary Defense Force units, distinct from the Space Marine forces players would recruit. Game developers indicated that the Imperium's internal workings and how players interact with them are still being refined. Concepts like gaining support from local planetary forces and governors to bolster Space Marine armies in battle are under consideration, offering the possibility of fielding auxiliary units alongside elite Space Marines.

Early demonstrations of the game have shown glimpses of this system, with Astra Militarum units engaging in combat before Space Marine reinforcements arrive. While these were presented as allied forces rather than directly controllable units, this suggests a potential for deeper integration.

A reputation system is also being teased, where players' actions as Space Marines will influence their standing within the Imperium. The development team aims to prevent players from appearing to build their own empires or amass excessive power, emphasizing the need to maintain favor with the ruling body and avoid actions that could be construed as heretical.

Creative Assembly plans to expand the game's content over time, with the intention of creating a unified sandbox experience rather than a series of separate installments. This approach suggests that additional elements of the Imperium, potentially including factions like the Adeptus Mechanicus, as well as other Space Marine chapters and xenos threats such as Genestealer cults, could be introduced post-launch. This differs from the previous Total War: Warhammer series, which was structured as a trilogy of distinct games.