We start to unravel some of that mystery [Prometheus] in episode 6, but for the time being we just know that he is a guy who is using lethal force. And he looks conveniently like a very evil version of my character.
—  Stephen Amell - TVGuide - Fall Preview | Returning Favorites

So…For what Stephen’s says above, it seems that Prometheus is a vigilante like Oliver was in S1…interesting!

  • Zeus:Read the charges.
  • Athena:Prometheus, you stand before this council accused of illegal genetic experimentation!
  • Zeus:How do you plead?
  • Prometheus:Not guilty! My experiments are only theoretical, and completely within legal boundaries.
  • Zeus:We believe you actually… created something.
  • Prometheus:Created something? Hah! But that would be irresponsible and unethical. I would never, ever...
  • [A human is revealed]
  • Prometheus:... make.. more than one.