Technology has progressed to a point where filmmakers can finally depict a place like Atlantis with the same fidelity that they would represent a place like Krypton or Themyscira, and that means that this version of Aquaman represents a watershed moment for the superhero genre.
Over the course of the last year or so we have heard some people close to Justice League and Aquaman talk about the things that set this character apart from other DC adventures.
One thing that this footage finally provides is context.
These people have almost universally stated that the depiction of the undersea world is what makes Aquaman’s corner of the DCEU unique, and we now finally have a much more thorough understanding as to what that means.