The Frozen Celestial Tiamut: Doom's Power Generator?

What Eternals Actually Locked In About Tiamut

Every theory about a dead Celestial in the Indian Ocean starts with Eternals (2021), which establishes Celestials as cosmic-scale beings created by an entity called Arishem, with certain planets, Earth included, existing purely as incubators for a new Celestial's birth. Earth's incubating Celestial is named Tiamut, its birth process called the Emergence, confirmed on-screen MCU canon, not fan interpretation.

The Eternals spend most of the film split over whether to let the Emergence happen, since it would tear the planet apart. In the climax, Sersi channels the surviving Eternals' combined abilities to turn Tiamut to stone mid-transformation, leaving a colossal, petrified Celestial head and torso jutting from the Indian Ocean, indistinguishable from a mountain range from above. Tiamut isn't destroyed, just switched off where it stopped.

Eternals also ends on an unresolved cliffhanger: Arishem, unhappy the Emergence was stopped, pulls Sersi, Kingo, and Phastos into the sky to judge whether humanity deserves to survive. That matters here because whatever authority governs Celestials, including who might reactivate or claim one, was left open by the story that introduced it, and nobody in the MCU has stepped in yet.

The Only On-Screen Follow-Up: What Brave New World Confirmed

For years, Tiamut sat narratively untouched, until Captain America: Brave New World, where Marvel Studios returned to the ocean floor: a newly surfaced, adamantium-rich landmass tied to Tiamut's body becomes a global flashpoint, with governments scrambling over mining rights to a metal the MCU had treated as a rare Wakandan import. For how that metal compares to vibranium and uru, we've covered it here.

That's the confirmed part: Marvel already told audiences Tiamut's corpse isn't narrative dead weight, it's a resource nations go to war over. What the film never addressed is the other half: adamantium is a metal you can mine and forge, but a Celestial is, by the comics' own definition, closer to a god, and nobody asks what happened to the gestating power inside that body, the part that was never metal. That unexplored gap is where this article sits.

Brave New World treats the landmass as a mineral deposit to drill and refine, not a source of active energy, which strengthens the case for unmined territory in Tiamut's remains: a movie already established people can stand on this dead god and extract material from it, making the idea of extracting something else from that body a smaller leap than for a random, uncharted planet nobody has set foot on.

The Scale Mismatch Nobody's Talking About

It's worth sitting with how big a Celestial is before going near Doom. Eternals shows Arishem's hand alone dwarfing the sun's corona while reaching down to judge Sersi, Ikaris, and Sprite, and Tiamut, even stopped mid-birth, is visualized on a planetary scale, big enough to read as a geological formation, not a body. Now put a single man in a metal suit next to it.

Doctor Doom, for all his genius, sorcery, and Latverian resources, has never been portrayed as Celestial-tier on his own. New to the character? our beginner's guide to Doctor Doom covers where his power comes from: scientific genius and Earth-based mysticism, not cosmic godhood. That gap is why a theory about him drawing on Tiamut is interesting, and why it should stay a stretch until Marvel Studios says otherwise.

It helps to size up Tiamut against other reality-scale MCU threats: even Thanos with a full Infinity Gauntlet was still a nine-foot-tall being vulnerable to a sword through the chest, while a Celestial's scale alone, planet-sized and older than most star systems, was the entire threat in Eternals, simply being born was enough to end life on Earth. That's a different category of power than Doom has wielded, why siphoning even a fraction of it has to stay theoretical.

The Theory: Could Doom Be Running an Incursion Engine Off Tiamut's Corpse?

Here is the theory, stated plainly so nobody mistakes it for a leak: this is this site's own speculation, with zero backing from any trailer, casting announcement, or Marvel Studios panel. The idea: Doom, ahead of or during Avengers: Doomsday, locates residual energy in Tiamut's petrified body, siphons it, and fuels a device capable of forcing open a rupture between universes, an artificial Incursion, rather than one happening by accident.

To see why that matters, you need the confirmed rules. Incursions are real, confirmed MCU canon, established in Doctor Strange in the Multiverse of Madness. Only two causes have been confirmed: dreamwalking, how Wanda Maximoff destabilized reality, and uncontrolled, unintentional universe-hopping, how America Chavez's star-portal power behaves without her control. Nothing on screen has shown a machine causing one, and a Doom-built 'Incursion engine' isn't a documented MCU power, just a concept this article is proposing.

• Confirmed: Tiamut is a real, dormant Celestial physically present under the Indian Ocean since Eternals.
• Confirmed: Captain America: Brave New World already treats that body as a resource worth a geopolitical crisis.
• Speculation: that anyone, Doom included, has tapped whatever cosmic energy remains inside it.

1. Doom's people survey the Brave New World mining site and detect a residual cosmic signature the adamantium extraction never accounted for.
2. Latverian engineering, backed by Doom's sorcery, builds a containment and siphon array anchored to Tiamut's petrified remains.
3. The harvested output is redirected into a device theorized to force a multiversal rupture on command, not the accidental kind Wanda Maximoff and America Chavez triggered.
4. That artificial rupture becomes the opening move in the universe-colliding scenario widely reported, though unconfirmed, for Secret Wars' take on Battleworld.

A dead Celestial is still the biggest unclaimed battery on the planet. Someone in this franchise was always going to try plugging something into it.

Why Latveria Would Need a Celestial-Sized Battery

Robert Downey Jr. is confirmed to play Doctor Doom in both Avengers: Doomsday (December 18, 2026) and Avengers: Secret Wars (December 17, 2027). That casting raises the stakes, since comics-Doom has a well-documented habit, reported and comics-context rather than MCU-confirmed, of hoarding cosmic-tier power to remake existence on his own terms. A villain reportedly building toward a Battleworld-style convergence needs a power source matching that ambition, and a man in armor, however brilliant, doesn't casually generate it from a Latverian workshop.

This is where the theory earns its keep as fun speculation rather than wishful thinking: Doom wouldn't need to be Celestial-strong himself, just a battery he didn't have to build from scratch, sitting where the last film left it. For how Doomsday is reportedly structured around multiple universes colliding, we broke down what's been reported here, though none of that reporting mentions Tiamut by name.

Ranking the Power Sources: A Skeptic's Scorecard

It helps to weigh Tiamut against other power sources fans have floated for Doom's endgame, if only to be honest about how speculative this theory is.

Laid out like that, the Tiamut theory isn't the safest bet on the board, but it has the strangest, most specific confirmed setup of the bunch: a film already treated that Celestial's body as valuable enough to start a conflict over metal alone. Extending that to energy is a leap, but from a confirmed launchpad, more than most fan theories can claim.

What Would Actually Confirm or Kill This Theory

Since none of this is reported anywhere, it's fair to ask what would move it from pure speculation into a rumor worth tracking. A theory like this should be falsifiable, not just repeatable.

• A Doomsday or Secret Wars trailer showing Doom, his agents, or Latverian tech near the Indian Ocean site introduced in Brave New World.
• Any official synopsis, junket interview, or Marvel Studios statement linking cosmic energy or Celestial power to Doom's plans.
• A comics tie-in or Disney+ special addressing what happened to the power inside Tiamut once the adamantium harvest began.
• The opposite would settle it just as clearly: an on-screen line establishing the extracted adamantium was the whole story, nothing else left to take.

Until one of those things happens, this stays exactly what it is: an entertaining, well-argued connection between two confirmed facts that Marvel Studios has never officially linked.

Verdict: A Fun Theory Built on Two Real Dots, No Confirmed Line Between Them

Strip away the speculation and here's what's locked down: Tiamut is real, on-screen, dormant MCU canon, its body already confirmed in Brave New World as a resource worth international conflict, and Robert Downey Jr. is confirmed as Doctor Doom for both Avengers: Doomsday and Secret Wars. Incursions are confirmed, with exactly two confirmed causes, neither a machine. Everything connecting those dots, that Doom taps Tiamut specifically, builds an 'Incursion engine,' or feeds Secret Wars' rumored Battleworld, is this site's own invention.

To track what gets confirmed as Doomsday's marketing ramps up, our explainer on what the film is actually about is the place to keep watching. Until then, file the Tiamut power-generator idea where it belongs: a well-argued, unconfirmed theory about the biggest unexplained loose end Eternals left behind.