“A shark that does not swim drowns,” CW’s new Arrow trailer proclaims. “If you don’t move forward, you die.” Good advice for Stephen Amell’s Oliver Queen, or better advice for Arrow fans going into season five? As alluded to in the show’s Comic-Con trailer, both Green Arrow and not-so-green Arrow fans are going to have to get onboard with a brand-new gang of newbie superheroes in desperate need of training. “It takes more than a few gold medals and a mask to take on these streets,” Oliver warns Echo Kellum’s Curtis Holt. A gang of sharks with a few Olympic gold medals and a mask, on the other hand? Well, who knows what season five will bring? The show returns October 5.