Arrow season 6
— Arrow (@CW_Arrow) October 4, 2017
The newly released promo video for the upcoming movie series, Arrow season 6 features Black Siren similar look to Laurel. The new promo video also features Cassidy as she opens up about Black Siren. It has been teased that Black Siren’s past seem to be more darker, but considering Cassidy’s return, her backstory is likely to be featured this season 6 of Arrow.
Source: The CW