User blog comment:Eobard95/Black Siren and Deathstroke should go to Legends/@comment-28501280-20171023142728

If they were going to add Katie Cassidy onto Legends, she should play Earth-One Laurel. Fans want the real Laurel back more than Black Siren and it would make more sense. If Sara wanted to bring Laurel onto the ship, she would pull her sister out of the timeline. Ultimately, she would have to be returned to the timeline before it becomes permanent, meaning she could only be on one or two seasons. I think it could be a powerful arc, with her finding out she's going to die and choosing to face her fate in order to save her City.

Siren and Oliver won't ever become a couple. She's nearly killed Barry, Felicity, Quentin, Dinah, Rene, Rory, Cisco, Caitlin and Oliver himself, as well as killing several innocents. No way would he ever be in a relationship with her. I vote for him and Dinah.