Big 40k Chaos rumors say new primarch models, codex books, box sets, and even a Defiler are on the way, along with a Chaos Space Marines refresh for 11th edition.
It’s looking like the Year of Chaos might live up to its name (just not in 2025.) Between whispers of new kits, refreshed models, and some suspicious product page disappearances, Chaos Space Marines could be about to get one of their biggest updates in years.
Chaos looks set to get a refresh in 2026, and if any of these rumors are even half right, Warhammer is about to get very interesting.
New Grotmas Story Reignites Iron Warriors 40k Rumors
Updated December 19th, 2025, by Rob Baer with the latest rumors from Grotmas.
A recent Grotmas Chaos short story for day 15 sparked fresh Iron Warriors 40k speculation, with fans tying its prophecy straight to long-running rumors. The big talking points line up cleanly: a new Defiler kit, new Mutilators, and expanded Chaos Space Marines support that finally gives Iron Warriors some real spotlight in 40k.
The Prophecy and the Eye of Terror Connection
The prophecy text name-checks imagery that screams Iron Warriors. Cadia, the Eye of Terror, cursed iron, furnaces, and endless geometry all map cleanly onto Medrengard and siege warfare themes. Lore hounds made the Perturabo connection fast, since he is the only Primarch who could always see the Eye of Terror, no matter where he stood in the galaxy.
Kits, Combat Patrols, and What Comes Next
The kit rumors are where this starts feeling very real. Talk continues around an Iron Warriors upgrade kit rolling straight into a future Combat Patrol, which is exactly how GW likes to quietly rebuild a subfaction without shouting about it. Expect hazard stripes, siege flavor, and enough bits to turn generic Chaos Space Marines into something that actually looks like they belong on Medrengard.
Then there’s the hardware. A new Defiler keeps popping up in the rumor cycle, supposedly a multi-option daemon engine that can slot cleanly into Iron Warriors, Black Legion, or whoever needs more legs and guns. Mutilators are part of that same conversation, with signs pointing toward a proper refresh that leans into brutal, close-range chaos rather than forgotten finecast vibes.
Vashtorr hovering over all of this makes sense. Daemon engines, siege warfare, and Iron Warriors working hand in glove fit the current narrative direction almost too neatly.
Is Perturabo Returning?
A Chaos Primarch return feels plausible, yet timing matters. All signs suggest setup, not payoff. If Perturabo walks back onto the board, it likely lands in 11th edition, but they have dropped Primarchs at the end of editions before.
The groundwork, though, is clearly being poured in our minds.
40k’s New Chaos Rumors Point to a Full Range Shake-Up
Chaos is apparently lining up a full-on refresh with new kits, revamped Legion boxes, and even some long-forgotten units crawling back into the spotlight. If these drops really do land before 11th Edition, the big question becomes: will they fold into the upcoming 500 Worlds campaign?
No one knows yet, but it would make a lot of sense for GW to roll out shiny new toys right before a major narrative push. For now, here are the latest 40k Chaos rumors for each Legion.
New 40k Chaos Rumors: Emperor’s Children
New Chaos rumors for the Emperor’s Children say to expect a very familiar box setup: two Noise Marine squads, twenty Emperor’s Children Legionnaires, and a Demon Prince to tie the whole screaming parade together.
It is basically the Fulgrim-era box, just replacing the Primarch with a punchy stand-in who still appreciates loud music and dramatic posing.
Thousand Sons: Chaos Rumors
New 40k Chaos rumors for a big new Thousand Sons box set are said to include a Mutalith Vortex Beast, Exalted Sorcerers, an Infernal Master, and a ten-man Rubric Terminator squad.
Chaos 40k Rumors For World Eaters
The World Eaters bundle box on the horizon leans right into the blood-soaked aesthetic. These new Chaos 40k rumors say to look for berserkers, bloodletters, and the usual Khorne-approved tools inside.
Mutilators
One of the biggest curveballs in the chaos rumor pile is the Mutilators. A brand new kit will supposedly ship as a trio, which tracks perfectly with GW’s habit of packaging elite infantry in threes.
Red Corsairs
The pirates of the 41st Millennium were mentioned again in the latest Chaos rumors, with a refresh that includes a new Huron model, a command squad, and a hunter-style unit.
Chaos Space Marine Rumors: A Bigger Plan for the Model Range
When you connect the dots, a missing core kit, talk of upgrade sprues, narrative hints, and cross-marketing with fiction, these new Chaos Space Marines rumors may be on to something.
Could this be part of a rumored “Year of Chaos” campaign, where multiple subfactions like Red Corsairs and Iron Warriors share the spotlight through incremental releases rather than one giant wave? Valrak and others think so. Here’s what they are saying.
Iron Warriors Rumors Confirmed (partially) at WCW
Let’s start with the hot rumors already partially confirmed at the WCW previews: a new siege assault plastic box set is on the way.
According to forum regulars like Bool, the Iron Warriors could be breaking free from the Chaos Space Marines codex to claim their own identity with a supplement.
Think new upgrade kits, custom units, and maybe even reimagined Obliterators returning to their roots. IW players, it might finally be your turn to feel the plastic love.
More Units on the way After The WCW Preview
The Iron Warriors rumors suggest their Combat Patrol is mostly nailed down, but there is still room for a few extra surprises after the WCW previews wrap. Based on the chatter so far, here is the short list of what could still realistically show up for Perturabo’s favorite grumblers.
- A dedicated Warsmith or Legion-specific HQ, something more imposing than the standard Warpsmith and tailored to the siege-master theme.
- A Legion-themed character upgrade frame, adding unique armor plates, bionics, or servo harness bits that push the Iron Warriors look past simple head and shoulder swaps.
- A small daemon-engine support unit, possibly a mini walker or backpack-mounted artillery type piece that reinforces their battlefield identity without needing a full vehicle refresh.
- A set of elite siege specialists, something equivalent to breachers or artificer-heavy infantry that finally gives the Iron Warriors a tabletop unit that matches their lore niche.
- A more robust vehicle upgrade sprue, even if small, adding hazard stripes, iron masks, reinforced plating, or servo chains to existing kits.
If GW really is lining up a Chaos range refresh before 11th Edition lands, the Iron Warriors feel like prime candidates for one more reveal that carries a bit more punch than a simple upgrade sprue.
Perturabo’s “Return:” Reality or Re-Sculpt?
Now, onto the big question: is Perturabo actually returning to 40k, or is this all smoke from the forge? The rumor mill says he’s “emerging from the Eye of Terror,” but not everyone’s convinced it means a full-blown narrative comeback.
However, the latest rumors suggest this won’t happen. So, we wouldn’t put too much stock into him returning. But, there is a small hope, so don’t totally let your dreams be dreams yet.
Some people suspect this could tie into the “Ascended” Primarchs line, the reimagined models for The Horus Heresy, not Warhammer 40k.
Maybe someone saw the Primarch mini, but doesn’t really understand the difference between 40k and HH models. So it is possible they just leaked that he’s coming for 40k, when it’s just HH…
If that’s the case, what some see as a resurrection might just be a glorious new sculpt of Perturabo in his Heresy-era armor. For those who’ve seen the level of detail on recent Horus Heresy releases, that’s hardly a bad thing.
Still, with Perturabo’s name popping up in the Vashtorr storyline and Iron Warriors featuring heavily in Chaos lore, the timing feels suspiciously perfect.
New Chaos Rumors Are Spiraling, and It Is Fantastic
The latest rumors have Red Corsairs lining up a “Lords of the Maelstrom” box, probably starring Huron Blackheart and his shiny new command squad. Think Titus, but angrier and with more flaming skulls.
They might also score their own elite hunter unit since every faction seems to be getting one of those flex squads. Keep reading for the rest of the overall new Corsair rumors.
Khorne: Red Plastic Apocalypse
A World Eaters and Daemons combo box is supposedly on the way, stuffed with juggernauts, bloodletters, executioners, and enough chain weapons to make Angron proud. This lines up with talk about a Khorne Kill Team picking a fight with the Grey Knights, complete with new models on both sides.
Alpha Legion: Sneaky Boys Get Some Love
Rumor has it that Solomon Akurra is getting a brand-new sculpt, hinting that the Alpha Legion might be the next warband to get spotlight time. If Night Lords got their moment, it is only fair that the galaxy’s biggest gaslighters get theirs.
More 40k Chaos Rumors Point to a New Defiler?
Converted Defiler by Rob Baer
Chaos rumors also mention that the Iron Warriors may also be getting a major upgrade kit. Still, the real eye-opener is that the “big iron reveal” is not Perturabo after all. Instead, it might be a redesigned Defiler stomping back onto the table.
The word is that a brand new spider tank kit is on the way with multiple build paths baked in. You can kit it out as a full-shooting monster with options like lascannons and a big chest cannon, or swing the other direction with a melee-heavy setup that leans into claws and close-quarters brutality.
The clever bit, according to the whispers, is the optional Legion flavor. The kit is rumored to include themed heads and details for groups like the Thousand Sons and Emperor’s Children, so you can match your Defiler to your chosen warband right out of the box.
If this new Chaos rumor lands the way it sounds, this could be the big centerpiece model everyone has been waiting for.
Fake or Real? Berzerker Surgeon Box “Leak”
So a new “leak” has been spotted using the new Chaos Rumor Engine bits. First off, the image itself looks sus. The art looks like someone Frankensteined together bits from the Eightbound box, flipped the background, and called it a day.
Some sharp-eyed hobbyists even spotted that Chaos Rumor Engine mech-arm hanging off his back.
Then there’s the name. “Berzerker Surgeon”? Come on. Loreheads will tell you the term you’re looking for is Butcher-Surgeon; that’s the actual World Eaters apothecary title. If Games Workshop really was dropping a new character kit, you’d better believe they’d stick to their own naming conventions.
And let’s not forget the proportions. The render looks pretty janky, tiny backpack bits, weird perspective, off-brand logos. It’s giving AI mashup vibes more than official reveal ones.
Auspex Tactics breaks it down way more in his CSI-style video here.
Chaos Marines Rumor Engine’s Getting Juicy
So here’s where things start getting spicy. That latest rumor engine image? Yeah, it’s basically screaming Chaos. Fans are connecting the dots between it and some fresh Red Corsair units. Then there’s the wild card, the “Butcher Surgeon” that’s been floating around the rumor mill for months.
It’s got that grim, bio-twisted vibe that fits right in with Fabius Bile’s worst science project. Whether it’s a Chaos Apothecary, a Warsmith, or something nastier, it sure feels like the Dark Gods are cooking up something big.
New Huron Blackheart Model?
Previous Chaos rumors said Huron Blackheart is getting a brand-new model. The infamous Tyrant of Badab has been stuck with his Finecast relic for far too long, and all signs point to him finally getting a modern plastic refresh.
What makes this more than idle chatter? The supposed timing lines up with the upcoming narrative arc, one that’s said to lean into pirate themes and Chaos raids across the stars. Huron leading the charge for a Red Corsairs-centered story would make perfect sense.
GW’s even reprinting his novel, which usually happens when a model drop is around the corner.
Red Corsairs Getting Rumored Reinforcements
Chaos rumors have not stopped saying that the Red Corsairs themselves may be set to receive new units, possibly one to three kits, to expand the faction’s raiding flavor.
Nothing points to a full-blown range overhaul, but a small expansion with themed troops or specialists would fit GW’s pattern. Think along the lines of a character release supported by a couple of new plastic kits and a narrative box to tie it all together.
If the next Warhammer reveal really is Chaos-focused, it wouldn’t be shocking to see Red Corsairs get their moment in the spotlight after years of lurking in the background. Maybe even fighting against some Aeldari pirates.
Chaos Rumors: Bikes and the Next 40k Edition
Another long-standing Chaos rumor making a comeback is that the CSM Bikes are getting redesigned, though reportedly not until the next edition of Warhammer 40k. With 11th Edition shaping up for 2026, that timeline lines up with GW’s usual approach: let the starter set breathe, then roll out fresh kits to maintain buzz.
New Chaos Bikes would also complete a long-overdue update cycle, bringing them up to the same visual standard as newer kits like the Chosen and Possessed.
Chaos Rumors Say Dark Mechanicum Is Finally Happening?
LI Dark Mechanicum
These Chaos rumors are huge and say to look for a whole new 40k faction drop. Not a one-off, not a detachment, a full-blown new army, Dark Mechanicum. These heretek-cyber-ghouls have been teased for years, especially with Vashtorr creeping into the lore and the Legions Imperialis release teasing models.
If the rumors hold, this release could be on the scale of the Leagues of Votann, meaning you’re looking at a solid launch box, multiple units, and enough lore to fill a codex. Start clearing shelf space and maybe your bank account.
Final Thoughts: New 40k Chaos Rumors
Between a vanishing Legionaries kit, fresh Huron hype, and Iron Warriors whispers, it’s hard not to feel like these 40k Chaos rumors are on to something big. Whether it’s a new plastic wave, campaign tie-ins, or a full faction spotlight, the writing’s on the wall, and it’s painted in blood and brass.
If you’ve been thinking about starting a Chaos Space Marines army or expanding an existing one, it might be time to wait just a bit longer. The Long War may finally be getting some long-overdue reinforcements.
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