Don't expect to see Superman, Batman, Wonder Woman, Cyborg, or the Flash team up with Jason Mamoa's Arthur Curry in 2018.

Aquaman director James Wan says the other Justice League members won't appear in his superhero's first standalone movie. "I wanted to keep the story to the world of Aquaman and not have to worry about what other characters are doing in their films and how that would affect us," Wan tells Entertainment Weekly. "I just thought the simplest way was to keep it clean—keep it simple and let it be an Aquaman story."

This isn't the first time Wan made his intentions clear. In a previous EW interview Wan said he told DC that while he understands and respects Aquaman is a "part of a bigger universe," he had a story he wanted to tell. "It was something the studio was respectful about...in my movie he starts off one way and becomes very different by the end," he explained. "It’s a classic hero’s journey. I equate our story to The Sword and the Stone, it’s a very Arthurian story about a journey to becoming king."

We still wouldn't be surprised if one of the superheroes made a cameo in an after-credit scene.

In addition to Wan wanting to have creative control, it might have been difficult to tie in Aquaman with the rest of the DCEU. Wonder Woman 2 is slated to take place in the '80s, a different time period than Aquaman, and it's still unclear what The Batman will be about or whether Ben Affleck will even reprise the role. There's also a Supergirl film in the works. And don't get us started on all the movies coming out about the Joker.

Aquaman, starring , Amber Heard, Nicole Kidman, Djimon Hounsou, and more, is slated to arrive in theaters on Dec. 21.