The CW is home to five DC Comics superhero TV shows, but the network’s president says no more than four can air at one time.
It’s worth noting that while The CW has six live-action DC Comics TV shows on the air (and seven total comic book-themed programs, including Riverdale), they also air Constantine and Vixen on CW Seed, thus bringing their total DC Comics content to eight shows.
The CW president Mark Pedowitz told Bloomberg that, due to increasing competition from comic book-based TV shows, they will only air four superhero shows at one time, whether they are part of the Arrowverse or not.
But in order to avoid being labeled as a superhero network, they air other programs as well and restrict the number of DC superhero shows airing concurrently to just four.