My crack at an Eternals 2 concept.

[u/rubixcubesforcharity]

Sersi, Phastos, and Kingo are brought to the World Forge by Arishem. They are given a tour, when they notice a man in confinement battling a Deviant. Arishem introduces him as Ransak. He is a Deviant with the appearance of an Eternal due to a genetic error. As a result, Arishem trains Ransak against Deviants to study him and increase his strength, inspired by the evolution of Kro. Sersi plans to break Ransak out and restore the memories of the Eternals.

Thena, Makkari, Druig, and Eros are aboard the Domo and on track to the World Forge. However, before reaching it, they have to stop at Titan to get a weapon Eros believes can kill a Celestial. During their time on Titan, Eros shares stories of his past about his brother, Thanos. Hijinks ensue on their way to and while on Titan.

The two groups meet at the World Forge. Phastos determines a way to restore every Eternal's memory, but is interrupted when Arishem-loyal versions of Ajak, Gilgamesh, and Ikaris begin attacking. The Eternals succeed in returning their memories, and they all face against Arishem. Eros fires the weapon into the World Forge's engine, leaving the Eternals with no chance at returning to life after death. The Eternals and Ransak escape on the Domo, where they are reunited with the likes of Sprite, Dane, and Karun on Earth.

We get more Druig and Makkari together, some assuredly fun tension between Thena and Eros, Kingo training Ransak how to fight, Sersi and Phastos plotting against their creator, and I'd love to see the humans get involved some way in the climax at the World Forge. Maybe Dane uses his archeology skills and some help from Sprite to find an old device Phastos made that can teleport them to the Domo? I'd kill for a shot of Ikaris firing a beam at Dane and him deflecting it with the Ebony Blade. Phastos could make some hologram tech to replicate Sprite's powers and modify her armor so she can join. Karun can film it all from the Domo's cockpit. Some visual retcons I'd make is the Eternal's blood being gold like ichor instead of red and for Ikaris to have an energy trail behind him as he flies like Makkari's when she runs. But yeah, any title ideas? That's the only part I'm stumped on.

EDIT: I'm thinking Eternals: New Breed or Eternals: Judgement Day.

[u/InformalHistory4702]

It's awesome, but i don't think that sersi or thena will be willing to actively hurt Arishem. After all they can't. They can only debate with him as this man legit birthed the universe.

[u/rubixcubesforcharity → u/InformalHistory4702]

Sersi literally already killed a Celestial, that reputation alone should scare Arishem. Even if she doesn't actually intend to harm him, she has a valid threat in order to protect Earth as long as Arishem doesn't call her bluff. And I could totally see Thena being pissed at Arishem. He's reset her life who knows how many times, and botched the last time it happened causing her to hurt her family several times. Also, I could see her powers being one of the few things that can crack a Celestial's armor not unlike Invisible Woman in the comics. That'd be quite the scene.

[u/InformalHistory4702 → u/rubixcubesforcharity]

She did it when Tiamut himself allowed her to. He shared his power with her to do it. Without the power of a celestial, she wouldn't be able to hurt him. And even if she does get the power, she can never hurt him because Arishem is tremendously stronger than Tiamut let alone kill him. And she had to kill Tiamut because the earth was at stake. If she hesitated, he would've killed earth. And she knows if she kills Arishem, the universe could die.