Gunn spoke about how this film informs 'Supergirl,' 'Lanterns,' 'Clayface,' and more. Without spoilers, of course.

Whenever—past or future—Superman meets Batman, Gunn has a pretty good idea what the Man of Steel will think of the Caped Crusader. “I think that he’d probably see a kindred spirit in that,” said Gunn, “Another crazy person wearing a crazy costume. With a very different intent.”