Wendy Mericle did a new interview with CBR about what is to come with the last 5 episodes of Arrow and she had this to say about Black Siren.
Speaking of legacy, can you tease your favorite thing about Black Siren’s return?
WM:What I love the most about Black Siren is seeing Katie Cassidy play a badass. [laughs] I mean, she was a badass before as Black Canary, but playing this other role with this darkness to it… it’s just a very interesting color for her to play, as she did Laurel, which she did an amazing job. She brings so much to this role, and it’s really seeing Katie really nail the ins and outs of this character. I think the other interesting thing about it and my favorite part is the impact that it has emotionally on the people who knew Laurel before she was unfortunately killed in Season 4. What does it mean to see this person who looks exactly like this person you loved and have them come back and be evil? It raises all kinds of questions for the people who knew her best, and that part is just absolutely rich character territory that we can play with and we’re really excited about doing that going forward.