James Gunn reportedly had big plans for Superman movies that may have led to the creation of a Justice League franchise, before his shock exit from DC Studios.

James Gunn and Peter Safran will step down as co-CEOs of DC Studios on Dec. 1 amid Skydance taking over Warner Bros. Discovery following the merger. Former Marvel exec Jeremy Latcham will replace them.

James Gunn says its entirely up to Margot Robbie if she wants to return as Harley Quinn in the DCU "Margot Robbie is one of my favorite actors to work with... I love her as Harley. I don't know if she wants to play Harley again"

James Gunn says he made up the Infinity Stones lore for the MCU in Guardians of the Galaxy in just 3 minutes, which later became the foundation for Avengers: Infinity War (2018). “I never understood what any of the phases were in Marvel. I don’t know what any of it means.” Gunn said Marvel simply asked him to explain what the Infinity Stones actually were. “When I wrote the scene with The Collector explaining that there was this explosion, and the Infinity Stones were born… that was literally me just sitting down for 3 minutes and writing that.” “And that’s then what became the rest of the Infinity Stones.” “That wasn’t in the plan to begin with.” Marvel had no concrete, long-term plan regarding the stones or how they would tie into future phases. Gunn's quick draft subsequently served as the foundational lore for the entire Infinity Saga, culminating in Avengers: Endgame (2019).