But after much hand wringing, Peacemaker Season 2 is finally well and truly DCU canon. Per Gunn, Peacemaker Season 2 is entirely be canon. As James Gunn has made clear before, the only parts that are truly canonical are the ones shown in the “Previously On...” segments before Peacemaker Season 2. Peacemaker’s “Previously On...” ExplainedThe Justice League cameo from Peacemaker Season 1 is replaced with a Justice Gang cameo in Season 2. Peacemaker Season 2 is now streaming on HBO Max.