Though it hadn't been formally announced, there was thought that the stand-alone Aquaman movie, to be directed by James Wan, would arrive for a summer slot in 2018. Now we know that it will actually land in October that year.
Aquaman, of course, will dive into more detail about Jason Momoa's sea-dwelling hero, who we glimpsed briefly in Batman V Superman and will meet properly in the first Justice League, which arrives on 17 November next year.
Not much is known about the story for the solo hero film, but Amber Heard will be back to play fellow Atlantis occupant (and queen) Mera, following her own Justice League introduction. Willem Dafoe is likewise on to play Vulko, whose comic history is a complicated one, swinging between trusted advisor and friend to the title character and dangerous threat.
Aquaman, assuming it keeps to the day-an-date plan of Justice League will hit UK screens on 5 October 2018.