User blog comment:Eobard95/Is Prometheus manipulating Felicity and Dinah?/@comment-3221148-20170303142953

>"Laurel made Oliver promise to find someone to succeed her. However he didn't do this until Earth-2 Laurel showed up, released by Prometheus."

This is an interesting point. Releasing Black Siren "just to mess with Oliver" seems a little bit petty for Prometheus. But what was he trying to do?