James Wan, second from left, directs a scene in "Aquaman" with, from left, Amber Heard, Jason Momoa and Willem Dafoe. (Warner Bros./DC Entertainment) ...

When Trenton Doyle Hancock was 10 years old, he made up a superhero: Torpedo Boy. The character has become the center of a complicated cosmos Hancock has developed obsessively for more than 30 ...