On June 26, 2026, James Gunn's DCU will finally deliver the long-awaited crossover between Superman and his cousin, Supergirl, in the film 'Supergirl.' This marks a significant moment for fans, as it will be the first time the characters properly team up in a theatrical release. While Superman and Supergirl have interacted in various media, including the CW's 'Supergirl' series, they have never shared the big screen in a meaningful way. The film will depict Kara Zor-El's origin story, including her arrival on Earth and her relationship with Clark Kent, played by David Corenswet. Clips from the film suggest that their initial encounter will be pivotal, showcasing their struggles to communicate and hinting at Clark's role as a mentor. Unlike the brief CGI cameo in 'The Flash,' which disappointed fans, 'Supergirl' promises real interactions between the characters, fulfilling a long-standing desire for a proper cinematic collaboration. With a runtime of 110 minutes and directed by Craig Gillespie, 'Supergirl' is set to reshape the narrative of these iconic heroes.