According to the site [schmoes know], "he’s going to look like a surfer essentially with tribal tattoos and all that jazz."
It has been rumoured in the past that Aquaman will want a piece of Superman when he makes an appearance in Batman v Superman because of the damaged caused to the Indian Ocean by General Zod’s World Engine in Man of Steel. They don’t confirm this, but they do reveal that the whales which we saw above Clark Kent when he fell into the ocean after saving the men on that oil rig WERE sent by Aquaman! Apparently, "Aquaman sent the whales to save Supes and make sure he was okay, which makes sense considering we never actually see how Supes gets back to shore in the film. He sees the whales and then it cuts to him walking on land, which could mean they were saving the swim back for Batman v Superman: Dawn of Justice." So, if that is indeed the case, Superman may have already met Aquaman, just off camera. That, or the fact that he helped him will be revealed. Either way, it should be interesting to see how this is addressed.