James Gunn says the future of Margot Robbie's Harley Quinn in his new DC Universe 'will be revealed down the line.'

Before spearheading the DC Universe, James Gunn was lauded for making the Guardians of the Galaxy a surprise hit on the big screen, and bringing a surprising amount of pathos to a more obscure group of characters.

If you're a fan of Gunn's Superman, or just Superman in general, "Adventures in the Making of Superman" is a great way to spend an hour. We rarely get to see these kinds of robust making-of features for current releases, especially for free, and we rarely see these kinds of actor-director relationships exposed so publicly.