The Fantastic Four: First Steps Ending Explained: Galactus, Franklin And The Doom Mid-Credits Tease

Short answer: Galactus offers to spare Earth in exchange for Franklin Richards, whose power he wants as a successor to his hunger. The Fantastic Four refuse, fight him with the whole planet's help, and win not by killing him but by using a teleportation bridge to throw him off-world entirely. Sue Storm dies holding the line and is brought back by Franklin, an infant, who does it instinctively. The Silver Surfer, Shalla-Bal, turns on Galactus at the last moment. The mid-credits scene then jumps forward and shows a masked figure in a green cloak alone in Franklin's room, reaching for him. It is Doctor Doom.

What actually happened

1. The film sets its Four in a retro-futurist alternate Earth, four years into their careers, as public figures rather than outsiders. Marvel has designated the universe Earth-828, a number widely understood as a nod to Jack Kirby's birthday on 28 August.
2. Shalla-Bal's Silver Surfer arrives as Galactus' herald and marks Earth for consumption.
3. Sue is pregnant, and Franklin is born in space during the team's first attempt to negotiate. His cosmic-radiation inheritance makes him something Galactus has been looking for.
4. Galactus offers the deal: give him the child and the planet lives. Sue refuses on behalf of the entire species, which is the film's defining character beat.
5. The team mobilises Earth publicly rather than secretly, which is the tonal difference between this and every prior Fantastic Four adaptation. The world helps.
6. The plan uses Reed's teleportation bridge network to move Galactus rather than to kill him, because killing him is not on the table.
7. Sue exhausts herself completely holding the field and dies. Franklin restores her.
8. Shalla-Bal breaks with Galactus. The Four survive. Earth survives.

The Sue Storm ending is the most important thing in the film and it is also the most easily misread. She is not saved by her husband or her brother. She is saved by her son, who is a baby, and who does something nobody in the film can explain. That is Franklin Richards from the comics in one gesture: a child with reality-level power that the adults around him have to live with.

The Fantastic Four beat a god by refusing a deal and then asking the entire planet for help. It is the least cynical ending Marvel has written in a decade.

The mid-credits scene, precisely

Years pass. Sue reads to Franklin in his room and leaves. A figure enters: green cloak, metal mask, face never revealed to camera, and reaches toward the child. The scene ends there.

• It is Doctor Doom. The armour, the cloak and the framing are unambiguous, and Marvel's subsequent announcements confirm it.
• The face is deliberately withheld, because Robert Downey Jr.'s casting as Doom was the reveal Marvel was holding for Avengers: Doomsday.
• Doom wanting Franklin is comics-accurate. Franklin's power has been a target for Doom in Marvel's comics for decades.
• The scene does not establish which universe Doom is from, which is the single most important unanswered question going into December.

It is also worth noting how well this sits with the comics context. Marvel's 2025 event One World Under Doom put Doom in charge of Earth on the page, and the studio's marketing has leaned into that alignment. Whether the film adapts that story is unconfirmed.

What it means for the wider story

The structural achievement here is that Marvel finally has a Fantastic Four film that works, in a franchise with three prior failed attempts, and it did it by not connecting to anything. First Steps is almost entirely self-contained. The crossover is delivered in a post-credits and a separate film's stinger, which we cover in our Thunderbolts* ending explained.

That self-containment is also why the ending reads as generous rather than transactional. Nothing in the final act is withheld for a sequel. Galactus is dealt with, Sue's arc completes, Shalla-Bal chooses a side, and the family is intact before the credits roll. The Doom tease sits outside the film entirely, which is the correct place for it, and it is why First Steps still works as a standalone for a viewer with no MCU history at all.

What's next

Avengers: Doomsday opens on 18 December 2026, having moved from its original 1 May 2026 date. Pedro Pascal, Vanessa Kirby, Ebon Moss-Bachrach and Joseph Quinn are all confirmed, meaning the Four go straight from their debut into an Avengers film. Anthony and Joe Russo direct, Michael Waldron writes, and Marvel's own logline describes heroes drawn from three distinct universes.

What we do not know, and should not pretend to: whether Franklin appears, whether the Doom of the mid-credits is the Doom of Doomsday, and what Chris Evans is doing in the film. Evans is confirmed to be in it; his role is not confirmed, and given that his last Marvel appearance was as Johnny Storm in Deadpool & Wolverine, the question is genuinely open. We break that cameo down in our Deadpool & Wolverine easter egg guide.