While there was initially uncertainly whether Jason Momoa’s Aquaman would appear in Batman Vs. Superman, I think we can take this as conclusive evidence that he will, before he gets his own spin-off film and an appearance in Justice League.
Indeed the first image of him in costume above suggests he’s going to have a major role in this, bring the Justice League together. Although it could also refer to the Seven Seas, with Aquaman being the only one true king of them.
We’ll first see Momoa as Aquaman in Batman v Superman: Dawn of Justice in March of 2016 (which is likely to be little more than a cameo), then he’ll appear in Justice League Part One in November 2017, an Aquaman movie on July 27, 2018, and then Justice League Part Two in June 2019.
Here’s how director Zack Snyder revealed the pic.
— ZackSnyder (@ZackSnyder) February 20, 2015