Season 1 of James Gunn's DC spin-off series Peacemaker originally ended with a cameo that was daring enough to make Gunn nervous. (Spoilers ahead for an episode from 2022.)
Peacemaker's season 2 premiere begins with a Zack Snyder retcon

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Season 1 of James Gunn's DC spin-off series Peacemaker originally ended with a cameo that was daring enough to make Gunn nervous. (Spoilers ahead for an episode from 2022.)