The Justice League has a post-credit scene.
While doing interviews on the London press tour, Jason Momoa teased that fans should stick around through the Justice League credits (via BBC).
They do. They do. You gotta sit through the whole thing. Go through the credits.
I don't want to get in--. Am I the guy that is going to spoil it? Is that why I am on the live show right now.
It's probably not too hard what the Justice League post-credit scene will feature as it's highly probably it will lead into Jason Momoa's Aquaman movie.
Still, another possibility for the Justice League post-credit scene could be another Justice League movie as both producer Charles Roven and JK Simmons have mentioned Justice League 2.
Or how about Green Lantern Corps?
Justice League has a November 17, 2017 release directed by Zack Snyder, with the story by Chris Terrio and Zack Snyder, the screenplay by Chris Terrio and Joss Whedon, and stars Ben Affleck as Batman, Henry Cavill as Superman, Gal Gadot as Wonder Woman, Jason Momoa as Aquaman, Ezra Miller as The Flash, Ray Fisher as Cyborg, J.K. Simmons as Commissioner Gordon and Willem Dafoe an Atlantean, Nuidis Vulko.
Fueled by his restored faith in humanity and inspired by Superman’s selfless act, Bruce Wayne enlists the help of his newfound ally, Diana Prince, to face an even greater enemy. Together, Batman and Wonder Woman work quickly to find and recruit a team of metahumans to stand against this newly awakened threat. But despite the formation of this unprecedented league of heroes—Batman, Wonder Woman, Aquaman, Cyborg and The Flash—it may already be too late to save the planet from an assault of catastrophic proportions.