User blog comment:Eobard95/Arrow Season 6 - Two characters dying?/@comment-31657011-20170811160255/@comment-24152851-20170814125129

Black Siren was likely planned before the Laurel backlash. They wouldn't have wasted Katie Cassidy when they had the perfect opportunity to bring her back despite her main character dying. You ever heard of a writer's pet? It's a character who the creators love and keep selling as the amazing hero who everyone's supposed to love, but in reality they are despised by the fandom. Felicity Smoak is the Arrow writer's pet, the creators love her and that's all that really determines the outcome.

Eddie was planned to die before Season 1 had even aired, because WestAllen had to happen somehow. I honestly get the opposite impression from that, Felicity apologising is them trying to fix the character everyone hates instead of disposing her. Even if a main character will die, I still doubt it's Felicity because she's not the one with least to offer. If anything it'll more likely be Thea since Willa Holland doesn't even appear for whole seasons any more and might be leaving Arrow at some point.