Flash Theory Reveals New Killer Is Arrowverse Fans' Oldest Villain Wish

screenrant.com:

According to a new theory, The Flash season 8’s serial killer mystery is about to grant Arrowverse fans their oldest villain wish by turning Eddie Thawne into a DC Comics villain. Going all the way back to season 1 when Rick Cosnett’s character was still alive, there were theories that he would evolve into Cobalt Blue, one of many powerful villains in Barry Allen’s rogues’ gallery. Even after Eddie’s death in the finale, speculation persisted that The Flash would eventually find a way to move in this direction.

If the latest Cobalt Blue theory is true, the character could be linked to Central City’s newest threat. The Flash season 8, episode 8, titled “The Fire Next Time”, saw Barry try to solve two murders in an effort to exonerate the Hotness. In the end, he was able to prove the season 4 villain’s innocence, but he never did catch the real killer. As a result, this mystery is sure to linger on for the next few episodes. Due to a casting announcement, a key suspect has already emerged. Some think that an evil version of Ronnie Raymond’s Firestorm is the one who burned the two victims to death. While it is true that Robbie Amell’s character is coming back for a two-episode arc, that’s far from confirmation that he’s the show’s metahuman serial killer.

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Instead of connecting the murders to Firestorm or introducing a brand-new villain, The Flash season 8 has a chance to introduce a new version of an entirely different Arrowverse character. if so, the serial killer could be a foe who will challenge Barry Allen (Grant Gustin) and his allies both physically and emotionally. Here’s how The Flash season 8 can bring back Eddie Thawne as Cobalt