16 years after he left his mark on the world of Marvel Comics by playing the Green Goblin in Spider-Man, Willem Dafoe made his DC movie debut in Aquaman, where he appeared as Nuidis Vulko, mentor to Jason Momoa’s Arthur Curry. However, that wasn’t the first time that Dafoe played Vulko, as originally the plan was to introduce the character in Justice League and use him to flesh out Arthur’s past and status in Atlantis.