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On Threads, a fan asked Gunn why Krypto wasn’t featured in the Justice Gang cameo. Apparently, he was left behind in the Fortress of Solitude due to his unruly behavior. “[No] way they’re trusting that dog to stop an alien invasion,” Gunn wrote in his response.
Krypto Isn’t the Only Superman Character Who Doesn’t Return in Peacemaker

Gunn previously described Peacemaker Season 2 as the “direct follow-up” to Superman, and the show features several characters who first appeared in the movie. Despite those connections, there are some notable absences. Many wondered why Metamorpho (who joined the Justice Gang at the end of Superman) didn’t appear in the Peacemaker cameo. Gunn explained Peacemaker Season 1 takes place prior to the events of Superman, meaning Metamorpho wasn’t part of the team yet.
It makes sense why Metamorpho wasn’t in the Peacemaker recap, and Gunn’s reasoning for not including Krypto is also sound. While the dog proved himself in combat in Superman (saving Kal-El from Ultraman and destroying Lex Luthor’s drones), he’s too much of a wild card to bring on a highly important mission. If the Justice Gang had arrived in time to help Peacemaker and friends, they would have had their hands full battling the Butterflies. They didn’t need an unpredictable variable like Krypto to worry about as well. The dog’s big action scene in Superman is very contained; Superman is in control of the situation and needs Krypto to complete one task to get the edge on Ultraman. Facing off against an alien army isn’t in the same ballpark.








