James Gunn is tempering expectations for Man of Tomorrow before the Superman follow-up reaches theaters. In a response on Threads, the filmmaker said audiences should not anticipate “substantial amounts” of additional characters, emphasizing that the film is fundamentally about Clark Kent and Lex Luthor.

That is a useful clarification for a project that has attracted speculation around nearly every possible DC hero, villain and surprise cameo. Gunn’s point was not necessarily that no other faces will appear. Instead, he drew a line between a supporting appearance and a movie built around a large intake of fresh characters or lengthy detours for players outside the established core.

“It’s [a] movie about Lex and Clark,” Gunn wrote, adding that viewers should not expect substantial amounts of other characters.

Gunn later explained that he meant both the number of new additions and the amount of screen time given to characters who were not central to Superman. He made one explicit exception: Brainiac. The filmmaker also warned that online discussion has inflated rumors and that much of the circulating material is incorrect.

A character-focused message, not a promise of an empty supporting cast

“Substantial” is doing important work in Gunn’s wording. It does not rule out supporting characters, returning figures, or a short appearance designed to establish where another corner of the DCU stands. It does mean that fan expectations should be calibrated away from the idea that Man of Tomorrow will function primarily as a launch pad for a raft of new franchises.

In practical storytelling terms, a Clark-and-Lex focus suggests the film’s dramatic energy is likely to reside in their conflict: the hero and the antagonist, their opposing ideas, and the consequences of putting them in the same story. That is a more specific promise than a broad “DCU event” label. It sets the pair at the narrative center rather than treating them as hosts for an expanding guest list.

This distinction matters because modern shared-universe conversations can turn casting reports, cryptic social posts and fan theories into assumed plot architecture. A character can be rumored, plausible within comic-book history, or desirable to audiences without actually having a major role in the finished film. Gunn’s comments directly challenge that leap from speculation to certainty.

They also offer a sensible way to read future reporting. Until a role is formally identified, it is safest to separate three categories:

  • Confirmed: details Gunn has publicly addressed, including the Clark-and-Lex emphasis and Brainiac’s stated relevance.
  • Unconfirmed: casting or character claims that have not been publicly verified.
  • Interpretation: conclusions fans draw from comic history, actor associations, or the needs of a wider continuity.

Those categories often blur together online, especially with comic-book properties where an enormous back catalog can make almost any theory sound credible. Gunn’s update is a reminder that credible possibility is not the same thing as a confirmed part.

What is confirmed about Man of Tomorrow

Man of Tomorrow is Gunn’s next directing project in this branch of the DCU and is scheduled for theaters on July 9, 2027. David Corenswet is set to return as Superman/Clark Kent, while Nicholas Hoult returns as Lex Luthor.

Brainiac is the major non-core exception Gunn named in his explanation. Lars Eidinger is set to play the character, who is positioned as the film’s principal threat. The project is described as the first Superman movie to feature Brainiac as its big bad.

For readers keeping track of Superman’s wider screen path, there is also recent discussion around Superman’s streaming status in Australia and Spain. That distribution topic is separate from Gunn’s new comments, but it illustrates the continued momentum around the character as the next movie takes shape.

Why Brainiac changes the conversation

Brainiac’s named presence is significant precisely because Gunn presented him as an exception to the limited-new-character expectation. In this context, “big bad” means the principal antagonistic force: the villain whose actions or threat frame the story’s central conflict. That does not automatically answer the question of how the character relates to Lex, how much of the plot each villain occupies, or whether the two work together. None of those details were provided.

What can be said is that naming Brainiac alongside a movie framed around Clark and Lex gives the film an unusual-looking balance on paper. Lex Luthor is one of Superman’s defining human adversaries, while Brainiac is being singled out as the larger villainous threat. The story could potentially use that contrast to pressure its lead characters, but that is analysis rather than confirmation of plot mechanics.

It is also worth resisting a common mistake: “a movie about Lex and Clark” does not mean Lex must be the only antagonist, and “Brainiac is the big bad” does not mean Lex becomes irrelevant. Gunn’s statement explicitly keeps both Clark and Lex at the center while separately carving out space for Brainiac. The specifics of that arrangement remain under wraps.

The Adria Arjona question remains unanswered

Adria Arjona’s role has not been disclosed. Speculation has linked her to Wonder Woman, but that remains unconfirmed. Gunn’s comments provide no basis to upgrade that theory into a fact.

The filmmaker’s warning about overstated or inaccurate rumor material applies especially well here. An unidentified role can generate intense interest, and Wonder Woman is an obvious subject for conjecture in any new DCU project. But a possibility is still only a possibility until the production identifies the character or otherwise makes the casting official.

Even if an unannounced character eventually appears, Gunn’s remarks establish an expectation about scale. The meaningful question is not merely whether a character exists in the film; it is whether that figure is a core part of the plot and receives substantial time onscreen. By Gunn’s account, audiences should not expect many newcomers to meet that threshold.

What viewers should and should not take from Gunn’s update

There are clear takeaways from the director’s comments. Man of Tomorrow is being presented as a Superman-and-Lex story. Brainiac is a stated exception among characters outside the core established by Superman. And the current flood of claims about hidden players should be approached skeptically.

There are equally clear unknowns. Gunn did not reveal the film’s story, explain the relationship between Lex and Brainiac, identify Arjona’s role, list returning characters, or say that absolutely no surprises exist. He also did not define an exact number of supporting roles or screen-time thresholds.

That leaves room for mystery without turning mystery into a license for certainty. For now, the most grounded expectation is also one of the most appealing: a Superman film with its attention fixed on Clark Kent, Lex Luthor and the looming arrival of Brainiac, rather than an overcrowded exercise in checking off DC names.