When it comes to Aquaman in Batman V. Superman: Dawn of Justice, there has been very little confirmed information about the character. While almost every major entertainment news site has reported that Jason Momoa will appear as Aquaman in the film, neither Momoa nor Warner Bros. has confirmed that he is in the film. However, Momoa was spotted in the Michigan area while Batman V. Superman: Dawn of Justice was filming, so it's a pretty good bet the rumors are true.
As far as how Momoa will depict Aquaman on the big screen, the film buffs over at Schmoes Know claim to have the answer. Accoding to the site, they received information that Momoa's Aquaman will look like a surfer essentially with tribal tattoos. Of course, that description isn't too surprising considering that's sort of what Momoa looks like already.
Schmoes Know also offers up one other nugget of information, which is actually something many fans had speculated about in the past. In Man of Steel, Clark Kent saves his co-workers on an oil rig, but he falls into the ocean when the oil rig collapses. While Clark floats unconscious in the ocean, there are two whales that swim by that he sees just as he wakes up.
Well, apparently all the speculation that those two whales were sent by Aquaman is correct according to their sources. Except instead of being mad about the oil rig collapsing in the ocean, Aquaman reportedly sent the two whales to make sure Clark was ok.
Batman V. Superman: Dawn of Justice is scheduled to be released in movie theaters on March 25, 2016.