James Gunn Has Already Begun Writing His Next Film

James Gunn didn't wait for opening night. He started scribbling scenes for his next movie months before Superman: Man of Tomorrow even lands in theaters.

On Threads, Gunn told a fan he began work on the new screenplay while he waited for the rough cut of Superman: Man of Tomorrow to come together. Simple reasoning, he said: when you're between big deadlines, you write. Short sentence. Still true.

Superman: Man of Tomorrow is due July 9, 2027, and Gunn has been steering the project through post-production since principal photography wrapped last August. The film carries on from the 2025 Superman, with David Corenswet back in the cape. Lex Luthor, played by Nicholas Hoult, returns—but this time he and Superman find themselves reluctant allies against a larger threat: Brainiac, portrayed by Lars Eidinger.

The cast reunites familiar faces. Rachel Brosnahan returns as Lois Lane. Skylar Gisondo is back as Jimmy Olsen, Sara Sampaio returns as Eve Teschmacher, and Isabela Merced wears the wings as Hawkgirl. Nathan Fillion returns as Guy Gardner and Edi Gathegi as Mr. Terrific. Millie Alcock, who had a brief Kara Zor-El cameo and led this summer's Supergirl film, appears again. And Aaron Pierre will make his first theatrical appearance as John Stewart, following his debut in the Lanterns series on HBO Max.

Behind the scenes, Gunn co-runs DC Studios with Peter Safran, a partnership that has reshaped how the studio coordinates film, TV and comics. Gunn has praised Safran for keeping the operation steady, connecting creative corners and treating the stewardship of these characters with real seriousness. They both know they're working with franchise icons—and they seem intent on using that influence deliberately.

So what does Gunn starting a new script now mean for audiences? For one, it signals ambition and momentum. For another, it suggests he already has future beats in mind for the DC slate. Fans should expect surprises, but for now the best move is obvious: keep an eye on the release calendar and on Gunn's social posts—he's not done writing yet.