Man of Tomorrow: Superman Star Seemingly Confirms James Gunn’s New Wonder Woman

James Gunn’s DCU may have accidentally flashed its biggest casting secret yet before he promptly grabbed the fire extinguisher. Man of Tomorrow star Frank Grillo shared a fan-made poster depicting Adria Arjona as Wonder Woman, reigniting months of speculation that the Andor star is secretly playing Diana Prince in Gunn’s Superman sequel.

Frank Grillo shares fan-made ‘Man of Tomorrow’ poster, featuring Adria Arjona as Wonder Woman https://t.co/OmksFBMpRL

Grillo, who returns as Rick Flag Sr., shared artwork containing confirmed DCU characters including Superman, Lex Luthor, Mister Terrific, Hawkgirl, John Stewart, Supergirl, and his own Flag. The conspicuous addition was Arjona dressed as Wonder Woman. Then Gunn intervened. Taking to Threads, the DC Studios boss said Grillo doesn’t know whom Arjona is playing and warned fans against treating his post as confirmation.

Adria Arjona Keeps Feeding the Wonder Woman Fire

Adria Arjona in Hit Man | Credits: Netflix

Frank Grillo’s post would be easier to dismiss if it were the first breadcrumb. It isn’t. Adria Arjona has already been confirmed for Man of Tomorrow in an undisclosed role, and FandomWire previously examined whether she could be playing Wonder Woman after her casting became public. The actress subsequently made the mystery considerably more entertaining. During an appearance on Josh Horowitz’s Happy Sad Confused, she confirmed that she knew exactly which character she was auditioning for. When Horowitz suggested the previously rumored Maxima, Arjona merely replied:

Then Horowitz went for broke: “I’ll bet you $500 you are playing Wonder Woman.” Arjona didn’t deny it. Instead, she negotiated a charity wager involving Wonder Woman and Maxima, while teasing that she “love[s]” her costume. And then there is Gunn himself. Long before Man of Tomorrow, fans were already fancasting Arjona as Diana. When speculation erupted over Gunn following her on Instagram, he explained that the two had known each other since The Belko Experiment. But he volunteered something intriguing anyway, telling Extra:

That comment has aged rather suspiciously now that James Gunn has actually cast her in his DCU. Maxima remains the obvious spoiler to the theory. Early reporting linked Arjona to the alien queen before the Wonder Woman chatter took over, and Arjona herself hasn’t ruled Maxima out. For now, Gunn has successfully kept both doors open.

Man of Tomorrow Is Becoming a DCU Crossover

Image Credit: Warner Bros.

Whoever Arjona plays, she is joining a movie considerably larger than a conventional Superman 2. Man of Tomorrow arrives July 9, 2027, with David Corenswet returning as Superman and Nicholas Hoult as Lex Luthor. Gunn has described the story as forcing the adversaries into an “unlikely alliance” against a greater threat.  The ensemble has since grown into something approaching a miniature Justice League, with John Stewart, Supergirl, Mister Terrific, Hawkgirl, Guy Gardner, and Rick Flag Sr. joining Superman and Lex Luthor.

The timing of Arjona’s mystery becomes particularly interesting because DC Studios is separately developing a Wonder Woman movie. Gunn confirmed the project was being written while casting remained unresolved. Introducing Wonder Woman through Man of Tomorrow would hardly be unprecedented. Gal Gadot’s Diana entered the previous DC universe through Batman v Superman: Dawn of Justice before receiving her own solo movie.

Arjona could theoretically follow the same route, debuting in Man of Tomorrow before a larger Wonder Woman role. Nothing Gunn has said confirms that plan, though, and Maxima remains firmly in play. So Grillo didn’t accidentally confirm the DCU’s Wonder Woman. Gunn has made that much clear. What he hasn’t done is tell us who Arjona actually is, which leaves both Diana and Maxima on the board.

Do you think Arjona is secretly playing Wonder Woman, or is Gunn hiding Maxima in plain sight? Tell us which character you think walks into Man of Tomorrow and follow FandomWire for more Adria Arjona casting updates, news, and everything coming next from James Gunn’s DCU.