Continuity mistake: When Aquaman picks up the bottle containing a map in the Sahara, he is originally holding the bottle from the bottom while starting to unravel the map. The view cuts unravelling the map from his POV, and he is suddenly holding the bottle from the top. (01:21:29 - 01:23:19)
Other mistake: When Arthur meets Atlanna on the beach, she steps towards him. When the camera zooms out, there are no footprints in the sand.
Other mistake: During the final battle between Aquaman and king Orm, notice the propellers, both left and right prop rotate in the same direction, however the physical lay-out of the propellers are not matching (mirrored), thus one prop would give forward thrust, the other will give rear thrust. Not logical with both rotating in the same direction.
Answer: No, Vulko said they had unlocked the secret of unlimited energy whilst the rest of the world still thought the earth was flat. Atlantis was already old by then, so it's definitely older than 2000 years. Atlan ruled over Atlantis for thousands of years. To say Atlantis is over 10000 years old is probably the most accurate.
lionhead