The cast of "Peacemaker" and writer and director James Gunn were at San Diego Comic-Con to preview "Peacemaker" Season 2 with a Hall H panel, and John Cena and Gunn made a surprise appearance on a balcony to a crowd below.

John Cena has never been shy about his loyalty to James Gunn — and now, with Superman making waves across the globe, the Peacemaker star is speaking out about how the film’s success might shape the an