In the trailer, fans get glimpses of the titular hero as well as his mother Atlanna (Nicole Kidman), villain Black Manta (Yahya Abdul-Mateen II) and Mera (Amber Heard), among others.
Arthur is seen becoming acquainted with half-brother Orm (Patrick Wilson), where they appear to team up against Manta, the latter of whom says ominiously at one point, "I'm gonna kill Aquaman and destroy everything he holds dear."
"I'm gonna murder his family ... burn his kingdom to ash," the villain adds.
The first standalone Aquaman movie from 2018 earned over $1 billion at the global box office.
Whereas that film served as a "romance action-adventure movie" about Arthur and Heard's Mera, director James Wan told Entertainment Weekly the new installment is a "bromance action-adventure movie" with Arthur and half-brother Orm.
Wan, 46, also teased potential for future Aquaman movies and clarified that the new film is "not connected in any way to" recent DC big-screen offerings like The Flash.
"What I like between this one and the first one is you really do see the growth of Arthur. He starts off as this kind of wanderer, and in the second one he finally has more of a direction of what he wants to do with his life," the director told EW.
"If and when there is a third one, that's what it should be; it should be growing these characters because I think we've set up certain things in a good place in the second movie that you can definitely draw upon in a third," Wan continued.
"I don't have any stories, but growing the characters is the biggest thing that I think the next Aquaman movie should be about," he added.
Back in January 2022, Wan shared a behind-the-scenes photo on Instagram to celebrate the final day of filming the movie.
"And finally, finally, finally picture wrap on the actual last day of #Aquaman2 in Malibu with these two gents @prideofgypsies @thereelpatrickwilson Yes, we do get very wet, a lot, on this show," he wrote in the caption.
When the sequel's release date was postponed later that year, Wan explained on Instagram that he and his team were doing "big, epic world-building" and "need the time to do it right."