SPOILER WARNING: This article contains major spoilers for "The Flash & The Furious," the mid-season premiere of The Flash Season 5.
The Flash may be about to change the Arrowverse. In "The Flash & The Furious," the mid-season premiere, Cisco Ramon and Caitlin Snow made a startling discovery: Cicada's dagger contains anti-Dark Matter properties, which can effectively eradicate Dark Matter. In other words, the anti-Dark Matter contained in Cicada's dagger could pave the way for a metahuman cure.
Cisco stumbled across this discovery after Caitlin removed the last shards of Cicada's dagger from his hand. When she gave him the shards as a "souvenir," he took a closer look. He quickly realized his hands contained less Dark Matter after the injury and shared his findings with Caitlin, but they arrived at different conclusions. While Caitlin was thrilled that this discovery could remove Cicada's powers, Cisco didn't want to stop there and proposed the idea of a metahuman cure.
Caitlin balked at the idea of a metahuman cure. She pointed out that a cure could be a weapon if it fell into the wrong hands. She also reminded him that metahuman powers have created a lot of good, especially with heroes like the Flash. To counter, Cisco provided examples of metahuman powers that have gone wrong; for instance, Fallout couldn't be near his loved ones or they would develop radiation poisoning. He also explained how many people didn't get a choice when they became metahumans, while a cure would give them one.
Eventually, Cisco confessed why he was so interested in the idea of a cure. He saw the cure as a second chance to live a normal life, to build a family without feeling responsible for saving lives. Caitlin took this idea to heart and brought him to her father's lab in the Arctic so he could work on the metahuman cure in secret. There, she laid down a ground rule: they would never force a cure on anyone. "We're not just here to make a cure. We're here to make a choice," he agreed.
While a metahuman cure would impact The Flash, it has even wider implications for the Arrowverse as a whole. After all, Arrow, The Flash and DC's Legends of Tomorrow are interconnected. This means that one major change would cause a ripple effect, leading to changes for the other shows. Seeing as each team features metahuman characters, everyone could be affected. If the metahuman cure were to fall into the wrong hands, it could be forced on heroes who use their powers for good, including the Flash himself. This could fundamentally alter the face of the Arrowverse as fans know it.
Airing Tuesdays at 8 p.m. ET/PT on The CW, The Flash stars Grant Gustin, Candice Patton, Carlos Valdes, Danielle Panabaker, Tom Cavanaugh, Jesse L. Martin, Danielle Nicolet, Hartley Sawyer and Jessica Parker Kennedy.