The photo - see below - in question is a mystery is it from the film or for a trailer soon to be released. Personally I have no idea but I wouldn't be surprised if it was from the film and Snyder was simply working on the editing of the film, but who knows he might be teasing us of an upcoming trailer.
Now from my eyes it appears to be from a scene where they filmed in DjúpavÃk, Iceland based on the surroundings in the background and the costume Momoa is wearing - similar to that of the one we see him wearing in the Comic-Con footage, which took place in a more colder environment. Furthermore the person who he is talking to is more than likely Amber Heard's Mera.
Fuelled 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.
Justice League is directed by Zack Snyder and stars Henry Cavill as Clark Kent/Superman, Ben Affleck as Bruce Wayne/Batman, Gal Gadot as Diana Prince/Wonder Woman, Ezra Miller as Barry Allen/The Flash, Jason Momoa as Arthur Curry/Aquaman, Ray Fisher as Victor Stone/Cyborg, Amy Adams as Lois Lane, Jesse Eisenberg as Lex Luthor, Jeremy Irons as Alfred Pennyworth, J.K. Simmons as Commissioner James Gordon, Amber Heard as Mera, Willem Dafoe as Vulko, Ciaran Hinds as Steppenwolf, and Kiersey Clemons as Iris West.
Justice League hits theatres November 17, 2017.
