Arrow Season 5's Theme Will Be Legacy, Oliver Responsible For Creating Prometheus

Season 5 of Arrow will be one of conflict for Oliver Queen, but not just with villains looking to take down Star City's savior. Most of the conflict will originate from Oliver's past.

The aftershock of Laurel Lance's death will carry through the entire season, as Oliver looks back on their long history together. Executive Producer Marc Guggenheim spoke about the season's theme to EW, and it's one of legacy.

"Essentially the theme that we're dealing with this year is legacy. The idea [is] Oliver honoring Black Canary's [Katie Cassidy] legacy after Laurel's death last year. As the season progresses, you'll see that there are a lot of callbacks to season 1. What we're doing is we're dramatizing Oliver's desire to grow, move forward, and evolve, but this concept of legacy keeps threatening to pull him back to the early days."

That legacy is also the birthing place of a new enemy that shows up in Star City this year, Prometheus. Producers have hinted before that Prometheus's grudge toward Oliver is very personal, and that will be a central storyline over the course of the season.

"I can really only say that Oliver bears a measure of responsibility for the creation of Prometheus," Guggenheim teases.

Newly appointed Mayor Oliver Queen (Stephen Amell) finds himself challenged as he fights on two fronts for the future of Star City. With Diggle (David Ramsey) back in the military and Thea adamant about hanging up her hood as Speedy (Willa Holland), Team Green Arrow is down to just Oliver and Felicity (Emily Bett Rickards) – but they're no longer the only vigilantes in town. Green Arrow's public defeat of Damien Darhk at the end of Season Four has inspired a new crop of masked heroes to step up and defend the city, though their painful inexperience makes them obstacles, rather than allies, in the field. The arrival of a deadly new adversary will force Oliver to confront questions about his own legacy, both as mayor and as the Green Arrow.

Based on the characters from DC, ARROW is from Bonanza Productions Inc. in association with Berlanti Productions and Warner Bros. Television, with executive producers Greg Berlanti ("The Flash," "Supergirl"), Marc Guggenheim ("Eli Stone," "Percy Jackson: Sea of Monsters"), Andrew Kreisberg ("The Flash," "Supergirl"), Wendy Mericle ("Desperate Housewives," "Eli Stone") and Sarah Schechter ("Supergirl," "Blindspot").

Arrow returns to The CW on Oct. 5 at 8 p.m. ET.