As audinces continue to enjoy James Gunn 's Superman , the director is opening up about the tremendous pressure he felt leading up to the film’s release. With the film already nearing the impressive $400 million global box office mark and securing an 83% approval rating on Rotten Tomatoes,

Superman has not been performing as well overseas as it has in the US, and director James Gunn has now outlined certain factors be believes to have played a part in

Blade and Batman Begins writer David S. Goyer penned Man of Steel, the Superman movie that got the DC Extended Universe going. Earlier this month, the DC Universe franchise kicked off its film side with a Superman movie too,

Spoilers for Superman lie ahead, so read on at your own discretion.

Two of James Gunn's top five favourite comic book movies aren't about superheroes, directed by the likes of Park Chan-wook and David Cronenberg.

James Gunn says we almost didn't see Superman save a squirrel during one of the film's biggest fight scenes because of poor audience reaction.

"This started out as the worst day of my life, but I actually think it's the best day of my life," Gunn recalled thinking on the day he was fired.