Here’s a What If…? idea I have in mind related to Eternals, being in this case, Tiamut The Communicator.
Tiamut is the main character of this idea, with Sersi being the deuteragonist and Arishem as the main antagonist of this idea.
As you may know, the Eternals planned to stop Tiamut’s Emergence to save Earth, but Ikaris and Sprite tried to prevent this and tried to stop them to intervene, but what if… Tiamut emerged successfully? The Eternals died during the planet’s destruction, but Tiamut saved Sersi from her death. Sersi lamented her failure to protect all life on Earth as she grew attached to them ever since they got here. Tiamut, sympathizing with her, speaks to her while traveling to the cosmos for him to learn about life in the universe and why is it so important for it to preserve but also to maintain the balance of life and death. They arrived at the World Forge. Here, Sersi and Tiamut [the latter who become small to match her size] and they went to the Wall of Memories in order to regain her memories of past emergences, which Tiamut also stands witness off. Tiamut, begins to feel remorse for what Arishem did to so many lives he has destroyed to give birth to a Celestial. So Tiamut decided to stand against Arishem and take his place as the Prime Celestial. Tiamut later challenged Arishem for the title of Prime Celestial. Arishem, though disappointed at Tiamut’s defiance, accepted his challenge nonetheless. Arishem almost gets the upper hand, but Tiamut wins the duel, killing Arishem in the process.
As his first act as the Prime Celestial, Tiamut used his cosmic energy to recreate the Earth along with its population, including the other Eternals. Sersi questions why Tiamut decided to turn against his own kind for humanity. He reveals that he became inspired by the actions of one human, Tony Stark/Iron Man, like Ajak did. Humanity changed him, made him question his purpose and decide to find his own purpose, though it was to preserve the balance, but instead of hosting planets with Celestial seeds, he will find a peaceful way to preserve the balance, he bids farewell to Sersi and he proclaimed that he will return someday if they need him…
Like I said, it’s just a What If…? idea I have in mind
