WWE star John Cena appears to be teasing a role on HBO's upcoming series adaptation of the graphic comic book novel 'Watchmen'. The wrestler has shared two images on Instagram: one of a badge belonging to Watchmen character The Comedian and another of fan art depicting Dr. Manhattan, one of the graphic novel’s protagonists. In recent years, Cena has begun to spend more time out of the ring and on the big screen - appearing in the movies 'Trainwreck', 'Sisters' and 'Daddy's Home 2'.