Though Felicity and actor Emily Bett Rickards won't be in the final season of Arrow, the character's presence will still be felt by her family.
TV Line spoke with Mia Smoak actor Katherine McNamara about what effect Felicity will have on her daughter in the future timeline of Star City:
"[Mia] is not used to having to look out for anyone but herself, and she promised her mother that she would protect William," McNamara said. "But she can’t fight for him, so that’s real fear, and it’s something she doesn’t know how to handle. It’s quite the learning curve!"
The final season of Arrow will not only be checking in with the future version of Star City, but it will be reexploring the past as Oliver attempts to save the universe by sacrificing his life.
The trailer for Arrow's final season teased a number of events that will be revisited, not to mention the return of Thea, Katana, Tommy, and more. So while Felicity won't be back, there will be plenty of familiar faces this season.
As for Mia, she will continue to make her parents proud in her time by fighting alongside the Canaries. An all-female Arrow spinoff centering around Mia, Laurel, and Dinah is in the works and will jump off from an episode in Season 8 of Arrow. Felicity's absence may be bittersweet, but her legacy will live on in the Arrowverse.
Returning Tuesday, Oct. 15 at 9 p.m. ET/PT on The CW, Arrow stars Stephen Amell as Oliver Queen, David Ramsey as John Diggle, Rick Gonzalez as Wild Dog, Juliana Harkavy as Black Canary, Katie Cassidy as Black Siren, Katherine McNamara as Mia Smoak, Joseph David-Jones as Connor Hawke and Ben Lewis as William Clayton-Queen.