Superman Legacy: Nathan Fillion, Isabela Merced and Edi Gathegi cast in new movie

According to James Gunn, we still have another “two years” to wait until Superman: Legacy opens but that doesn’t mean we’re not getting tidbits of news here and there, the latest being new casting announcements for Green Lantern, Hawkgirl, and Mister Terrific.

“Superman: Legacy opens two years from today,” Gunn said on Instagram alongside artowrk from Julian Totino Tedesco (below). “It may seem far away to many of you, but it’s close to me!

“We have a lot to do between now and then. But I haven’t been more excited about a project in forever… and this cast, slowly coming together… holy cow…”

As reported by Vanity Fair, Nathan Fillion is set to play Green Lantern, Isabela Merced will play Hawkgirl, and Edi Gathegi will be Mister Terrific.

This comes alongside the already-announced casting of David Corenswet (The Politicial) as Clark Kent and Rachel Brosnahan (The Marvelous Mrs. Maisel) as Lois Lane.

The latest casting announcements were confirmed on Twitter by Gunn: “True,” he said while posting a link to the article. “Welcome to the cast of Superman: Legacy: Nathan Fillion as Green Lantern Guy Gardner, Isabela Merced as Hawkgirl, and Edi Gathegi as Mister Terrific.

Fillion is no stranger to genre, having previously had roles in Buffy, and Firefly and is no stranger to Gunn, either, starring in a number of the director’s films, including the recent Guardians of the Galaxy Vol. 3.

Green Lantern Guy Gardner is famous for his ginger bowl cut, so we can’t wait to see that… “Giving my old pal Nate a bowl cut might have been my primary reason for casting him 😂” Gunn said on Threads.

Isabela Merced has been acting since a young age (Dora the Explorer has been one of her many roles) and was last seen playing Juliet in Rosaline, the comedic retelling of Romeo and Juliet.

Edi Gathegi’s genre credits include playing Laurent in the Twilight films and Darwin in X-Men: First Class, and he’s recently been seen in Apple TV’s alt-history sci-fi drama For All Mankind.

Gunn has described Superman: Legacy as “the true beginning of the DCU” and will focus on a younger Superman (which is why Henry Cavill couldn’t return to the role), though it won’t go into Supes’ well-known origin story.

Early-pre production is well underway on the movie with, according to Gunn, “costumes, production design, and more now up and running.”

Superman: Legacy will be released 11 July 2025