Some directors are known for working with the same actors multiple times, and "Superman" writer/director James Gunn is definitely one of those filmmakers. So it should come as little surprise that at least three "Guardians of the Galaxy" actors make cameos in the upcoming "Superman".

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.

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.