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

A fan of superheroes from a young age, Angela Spica becomes a super-scientist, leading her to connect with the original Engineer, who sends her all his notes and experimental tech as a contingency when he's killed in battle, leading her to make her own breakthroughs and to take up his heroic mantle.

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.”