Justice League director Zack Snyder released some brief footage on Vero yesterday of Jason Momoa’s Aquaman swimming underwater.
In the video, Aquaman appears to be swimming towards either Poseidon or possibly Ocean Master. Either way, the special effects look pretty cool.
Snyder does not specify if this particular shot is from the Justice League movie he is directing (which has a release date of November 17th, 2017) or the upcoming Aquaman movie that, as I mentioned previously, will be directed by The Conjuring and Furious 7’s James Wan. Aquaman has a scheduled release date of October 5th, 2018.
Warner Bros does plan on releasing solo movies for all their Justice League members over the next few years as they continue to build popularity for their non-Trinity (Batman, Superman & Wonder Woman) DC Comics properties.

Per IMDb.com, here is the synopsis of the Justice League movie:
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.
In Justice League, beyond Jason Momoa as Aquaman, we will see Ben Affleck return as Batman, Henry Cavill as Superman, Gal Gadot as Wonder Woman, Ezra Miller as The Flash, Ray Fisher as Cyborg, Jeremy Irons as Alfred, Jesse Eisenberg as Lex Luthor, J.K. Simmons as Commissioner Gordon, and Willem Dafoe as Nuidis Vulko.
