One of the more peculiar rumors that we’ve heard repeated a few times is that Amanda Waller (Viola Davis) is going to have Aquaman’s trident in her headquarters, holding it as a trophy.
If that’s true, then it would be an obvious hint that she has him imprisoned, and in that case we might even see more of the character than was initially believed, though it’s still not clear what kind of presence he’s going to have in the new film.
It’s also possible that his character might just get referenced and kept as an off-screen presence, although so far we have reasons to believe that we’re actually going to see him on the screen. And seeing him get to use that trident a little bit definitely wouldn’t be a boring ordeal for most fans as well, although that might be reaching a bit too far. After all, the movie is focused on other characters, and is supposed to be telling their story.