When we last left Laurel Lance (the Earth-2 version), she had just promised to be worthy of wearing Earth-1 Laurel’s Black Canary suit as she worked to become a hero worthy of her late doppelganger.
Earth-2’s Laurel Lance has made a new home for herself in Star City, taking on her late doppelganger’s identity and inserting herself into the city structure as the District Attorney. However, is she still evil?
Seven years. That’s how long it took for Arrow to finally get the character of Laurel Lance (even if she happens to be the second incarnation from Earth-2) in the right hands. And it shows.
Let’s face it, Arrow’s Oliver Queen is a murderer. So are Felicity, Dinah, and Thea, but nobody has held those four to the same moral code as they hold Earth-2 Laurel Lance, AKA Black Siren.
As the biggest advocate for Black Siren to find redemption and live a life that Earth-1 Laurel would be proud of (with her reputation on the line), Black Siren seems to be an attempted replacement.