Marvel’s multiversal mystery box may have gained another very interesting name. Noah Jupe, known for A Quiet Place, is reportedly joining Avengers: Secret Wars in an undisclosed role described as important to the film. Production is reportedly expected to begin later in 2026, but the character, the size of the part, and the exact place Jupe may occupy in the wider Marvel Cinematic Universe have not been officially detailed.
That lack of certainty has done what it always does in superhero fandom: it has turned a casting report into a full-scale corkboard investigation. The leading suggestions are particularly consequential ones. One points to the Beyonder, a being deeply tied to classic Secret Wars stories. The other proposes an older Franklin Richards, a character already associated with the MCU’s Fantastic Four corner and Doctor Doom. A few additional names have appeared in the conversation, including Iceman and Molecule Kid, but Beyonder and Franklin Richards are the theories with the clearest connection to the title on the poster.
For now, every proposed character should be treated as speculation rather than confirmation. Still, it is worth looking at why these two guesses have taken hold—and why either could make Jupe’s reported role genuinely pivotal rather than merely another masked face in an already crowded Avengers lineup.
The report leaves the character deliberately unknown
Jupe’s reported casting arrives with very little plot information attached. That is typical for an Avengers-scale production, particularly one bearing the Secret Wars name. The title carries enormous comic-book baggage involving worlds, reality-level power, major heroes and villains, and the kind of cosmic rules that can be rewritten with a dramatic hand gesture and an even more dramatic cape billow.
Jupe began acting as a child, with credits including The Night Manager, The Undoing, and A Quiet Place. More recently, his work includes Hamnet and Lady in the Lake. He also appeared with Sadie Sink in a Broadway production of Romeo and Juliet. That history is useful context, but it does not itself reveal who he might be playing. A performer who has grown up on screen can plausibly fit an established character seen at a different age, a new character, or a comics figure whose presentation has never been locked to one familiar movie version.
The reported description of the role as a key one is the detail driving the current debate. In a franchise where even a brief cameo can cause months of internet cartography, “key” is the verbal equivalent of placing a glowing red button beneath a sign that says do not theorize.
Why fans are looking at the Beyonder
The Beyonder theory stems partly from perceived visual similarities between Jupe and comic depictions of the character, but it has a much stronger narrative foundation than a side-by-side image comparison. The Beyonder is among the most recognizable figures linked to Marvel’s original Secret Wars concept. In that story framework, heroes and villains are brought to Battleworld, a setting designed for colossal confrontations and equally colossal toy-shelf energy.
The character has been portrayed in various ways across Marvel comics continuity, but a crucial idea persists: the Beyonder has power and perspective far beyond ordinary human experience. In notable versions of the mythology, he is curious, immature, childlike, or otherwise detached from the social and moral rules that guide the people he observes. Casting a comparatively young actor could therefore make thematic sense if the film chooses to explore a powerful being learning, testing, or catastrophically misunderstanding humanity.
That does not mean Jupe is definitively the Beyonder. It means the role is an intuitive match for the film’s title. A Secret Wars adaptation does not have to recreate any one comic run exactly, and Marvel Studios has frequently combined characters, timelines, motivations, and events when building its screen stories. Battleworld itself has not been confirmed as the setting of the movie. There has been discussion among fans that a post-credits scene in Spider-Man: Brand New Day could be planting seeds in that direction, but that remains interpretation, not a settled explanation.
Even so, a Beyonder role would explain why a new cast member could matter so much. Rather than being another participant inside the crossover, he could be connected to the force that makes the crossover possible. That is the sort of position that can make every returning hero, surprise villain, and universe-hopping detour answer to one very unusual teenager with access to reality’s control panel.
The Franklin Richards possibility is just as significant
The competing theory is an aged-up Franklin Richards. Audiences have already met a young Franklin in The Fantastic Four, where he also appeared alongside Robert Downey Jr.’s Doctor Doom in the post-credits scene. Franklin is expected by many viewers to matter in Avengers: Doomsday, though his involvement has not been formally announced.
In Marvel comics, Franklin Richards is no ordinary child of Reed Richards and Sue Storm. His history is heavily entwined with extraordinary cosmic potential, making him exactly the kind of character who can become central when a story starts dealing in collapsing realities and reconstructed worlds. An older version appearing in Secret Wars could offer a clean dramatic shortcut: show the audience a Franklin changed by time, dimensional displacement, or events that unfold between films, then let that change carry massive consequences.
The theory has also gained traction because some fans see a resemblance between Jupe and Pedro Pascal, who plays Reed Richards. Resemblance alone is never casting proof—Hollywood has survived without a family resemblance police force, despite several determined online volunteers—but it is easy to understand why the idea caught on. If the story requires a version of Franklin old enough to actively shape events, Jupe would be in an age range that makes the concept imaginable.
A Franklin reveal could also create a useful emotional center for a movie likely to contain intimidating amounts of plot. Cosmic conflicts work best when the stakes are not merely “all existence,” a phrase so large it can become oddly abstract. A family connection involving Reed, Sue, Franklin, and Doom could give the multiverse a human pressure point. If the movie travels that route, the biggest clashes would not only concern universes; they could also concern who gets to define a child’s future.
Other suggestions remain possible, but less directly supported
Iceman has been floated as another possibility, reflecting the expectation that mutant characters and the X-Men may become increasingly important to the MCU’s future. Molecule Kid has also been mentioned. Neither suggestion currently has public evidence behind it beyond fan reasoning and the general fact that Secret Wars offers a very large comics sandbox.
That is the real lesson of this casting mystery: a title as broad as Avengers: Secret Wars can make almost any Marvel theory sound plausible for several paragraphs. The most sensible distinction is between a character who has a direct historic relationship to the Secret Wars concept and a character who simply could appear because Marvel has a lot of characters. Beyonder and Franklin Richards clear that first bar much more easily.
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Avengers: Doomsday may be where the clues start
Very little has been publicly established about Avengers: Secret Wars, and that is unlikely to change in a major way before Avengers: Doomsday arrives in theaters later in 2026. The earlier Avengers installment is expected to establish the circumstances that lead into its successor, so it may be where viewers first learn whether Franklin Richards is in play, how Doctor Doom fits into the escalating crisis, and whether the story is building toward Battleworld or another interpretation of the comic event.
Until then, Jupe’s character is still a locked file rather than a solved riddle. The Beyonder case has strong title-based logic. The older Franklin Richards case has a potentially compelling MCU continuity link. Both are credible fan theories; neither is confirmed. What is confirmed is the appeal of a role that can turn a relatively quiet casting detail into a multiverse-sized question mark.
