It has been revealed that Stephen Amell’s Arrow was responsible for saving The CW. Before James Gunn’s upcoming DC Universe or even the movies of the old DCEU, The CW was the home of DC’s live-action shared universe, the Arrowverse. It all started in 2012 with Arrow season 1, and the fate of the entire network hinged on how the superhero series would perform, according to one of Arrow’s co-creators.
https://screenrant.com/arrow-save-cw-arrowverse-producer-reveal/