DC had no problem using the Marvel misstep to their advantage and snatched him up for their Suicide Squad sequel. Not just any director could have brought the level of enthusiasm and idiosyncratic flavor of humor that James Gunn delivers. Then, James Gunn organized some clever retconning (retroactive continuity is a term comic books readers are familiar with). HBO's "Peacemaker" Season 2 Premiere | Michael Loccisano/GettyImagesAt the end of Peacemaker Season 1, the Justice League made a brief appearance, with overt cameos by Jason Mamoa’s Aquaman and Ezra Miller’s Flash. So not only did James Gunn leave behind Marvel for the DC camp, he is bringing along his friends and family.