'Peacemaker' Season 2 is set in the same world as 'Superman.' Here's what to know about the John Cena DC show

John Cena as Christopher Smith in "Peacemaker." Katie Yu/HBO John Cena will reprise his role as the antihero Christopher Smith in "Peacemaker" season two. The first season took place in the previous version of the DC Universe. Now, "Peacemaker" season two is set in the same universe as the new…