The Wrap reports Grant Gustin has thanked the CW for kick-starting the “Arrowverse.” The network announced the upcoming 8th season of “Arrow” would be its last. Gustin stars as “The Flash,” making his debut as Barry Allen during season 2 of “Arrow.” Season 1 of “The Flash” aired a crossover between Supergirl” and “DC’s Legends of Tomorrow” in what has now become an annual event.“ This year’s “Elseworlds” introduces Batwoman, who is being developed to star in a standalone series.