Superman writer/director James Gunn is well known for including actors he enjoys working with in multiple projects, and this summer's big DC movie is no exception, as it includes an appearance from several members of the Guardians of the Galaxy,

The writer/director of this summer's "Superman" and the co-head of DC Studios offers a peek behind the curtain.

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.