James Gunn has added Edi Gathegi, Isabela Merced, and regular Nathan Fillion as Mr. Terrific, Hawkgirl, and Guy Gardner respectively to Superman Legacy's cast, Vanity Fair reports. They join David Corenswet, who will play the new DC Studios Superman, and Rachel Brosnahan as Lois Lane.

Fillion's Gardner will be the first official live-action debut of the character, who was introduced back in Green Lantern #59, as the first replacement for Hal Jordan. The first version was used in a pilot for a Justice League show in the late '90s that resembled more of the Kyle Rayner Green Lantern, but with the team based on the Justice League of the 1980s.