Opinion is sharply divided as to how high the superhero pic can fly when it hits theaters, with some suggesting a much lower range of $90 million to $120 million.

An early "Superman" teaser shot was mocked online for its depiction of the hero's flight. James Gunn said the shot "kind of got by" him.

James Gunn, the writer/director of 'Superman' and co-head of DC Studios, opens up about his social media presence, this summer's event film, and what's coming up next in his superhero universe.