Chaos Space Marines are not one of the four announced launch factions in Warhammer 40,000: Dawn of War IV. The confirmed roster is Space Marines, Orks, Necrons and Adeptus Mechanicus. A future expansion promises a new faction, but its identity is not established here, so it cannot be called a Chaos announcement.
If playing Chaos is your main reason to buy, the current answer is to wait for an explicit faction reveal. The existing information does not support a Chaos roster, campaign, release date or purchase recommendation based on future Chaos access.
The announced faction roster
| Announced faction | Relevant distinction |
|---|---|
| Space Marines | Includes the Blood Ravens and Dark Angels |
| Orks | One of the four launch factions |
| Necrons | One of the four launch factions |
| Adeptus Mechanicus | One of the four launch factions |
The Dark Angels are a playable Space Marines sub-faction, not a fifth entry replacing an unannounced Chaos force. The Space Marines campaign includes missions commanding both Blood Ravens and Dark Angels.
The Dark Angels belong to the announced Space Marines offering.
An unnamed new faction is not a Chaos reveal
The Aftermath expansion is described as campaign content that introduces a new faction. That statement confirms the broad plan for additional faction content, but it does not identify that faction as Chaos Space Marines.
Keep these questions separate when reading a roadmap:
- Is a new faction planned?
- Has that faction been named?
- Has playable Chaos Space Marines content been shown or explicitly announced?
A positive answer to the first does not answer the other two. Commander Edition includes Year One content, but buying an edition with future content is not a guarantee that the unnamed faction will be the one you want.
Campaign threats do not establish a playable army
The campaign premise involves Kronus, the Great Rift and a threat to the surrounding sub-sector. Those story elements leave room for questions about what the campaigns will reveal. They do not establish a playable Chaos faction or an unannounced unit list.
Likewise, a faction appearing in wider Warhammer 40,000 material does not prove it appears as a selectable army in Dawn of War IV. Check the game-specific roster instead of a general Warhammer faction list or a related article shown beside a trailer.
Check what a faction claim is actually promising
Before using a trailer or product listing as a reason to expect Chaos, identify the kind of claim it makes. A playable launch army, a future expansion army and a force mentioned in a story are different things.
| Wording you encounter | What it establishes |
|---|---|
| Four launch factions are named | The announced starting roster |
| Aftermath adds a new faction | Additional faction content is planned |
| A faction is explicitly named as playable | A specific playable-content announcement |
| A Chapter has a different paint scheme | Appearance alone does not identify another playable faction |
This also helps with Space Marine footage. The Dark Angels' green armour, Deathwing Terminators and bike forces belong to the announced Space Marines offering. Their presence is not a substitute name for Chaos Space Marines, and two Chapters within that offering do not leave an extra unnamed slot in the four-faction roster.
For a purchase decision, ask whether the product description explicitly names the faction you want. If it only says that an expansion contains a new faction, the practical result is still to leave that identity undecided.
What would change this answer
A clear announcement naming Chaos Space Marines as playable content would change the status. Useful details would include whether they are part of a campaign or another mode, whether the content is included with an existing purchase and when it is expected.
Until that exists, there is no reliable Chaos build, starting commander or unit progression to plan. Dawn of War IV remains unreleased as of 2 November 2026, with standard release scheduled for 3 December. Treat the four announced factions as the basis for a launch purchase decision, and leave the unnamed future faction undecided.