Justice League comes out in exactly a year, and some new details about the rapidly expanding DC Cinematic Universe have emerged. Vulko, the Atlantean extremist who’ll be a major villain in the standalone Aquaman movie, will first make his debut in Justice League, actor Willem Dafoe revealed in an interview on Wednesday.

“Well, Justice League is very particular because it’s an ensemble movie,” the 61-year-old actor told The Guardian, “and my character is being introduced here in order to be a principal role in Aquaman.”

The character, Nuidis Vulko, was first introduced in the comics in a 1967 issue of The Brave and the Bold, but the Snyderverse version of Vulko will probably draw more on the New 52 reinvention of the character. In the Justice League-Aquaman crossover storyline “Throne of Atlantis.” In that arc, Vulko orchestrated a war between Atlantis and the surface in an attempt to force Aquaman to retake the Atlantian throne.

That’s right, y’all. It was an undersea false flag operation.

Dafoe, who famously played Green Goblin back at the start of the superhero movie craze in 2002’s Spider-Man, will most likely appear as a minor advisor or ally to Jason Momoa’s Aquaman. His villainous, extremist ways probably won’t show until Aquaman, which is slated for a July 27, 2018 release date.

Michael K. Williams is already playing Black Manta, Aquaman’s most famous and deadly adversary. Vulko will probably be a secondary villain, or perhaps he’ll align himself with Manta for some misguided reason.

We’ll get a better sense of Vulko’s character when he appears in Justice League, which hits theaters on November 17 of next year.

Photos via DC, DC/Getty