UPDATE (10:03 a.m.): We've updated the promo with a better-quality official version.
The teaser reveals new footage from director Zack Snyder's film that focuses primarily on Jason Momoa as Aquaman. We see Ben Affleck's Batman hand him his trident, which the sea king then uses to part the ocean's waves. The roughly 15-second promo ends with a shot of the Justice League, minus Henry Cavill's Superman, aboard the Flying Fox -- a scene fans will recognize from a previously released image.
While the promo is available for now only in shaky footage captured on a phone, presumably Warner Bros. will release an official version later today.
Fueled by his restored faith in humanity and inspired by Superman’s selfless act, in “Justice League” 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.
Arriving Nov. 17, “Justice League” stars Ben Affleck as Batman, Henry Cavill as Supermanm, Amy Adams as Lois Lane, Gal Gadot as Wonder Woman, Jason Momoa as Aquaman, Ezra Miller as The Flash, Ray Fisher as Cyborg, Willem Dafoe as Vulko, Jesse Eisenberg as Lex Luthor, Jeremy Irons Alfred Pennyworth, Diane Lane as Martha Kent, Connie Nielsen Queen Hippolyta and J. K. Simmons as Commissioner Gordon.