Without Arrow, The Flash and Legends of Tomorrow never would have happened, and The CW may not have seemed like a perfect fit for Supergirl if the other superhero shows weren’t already airing successfully.
Even Black Lightning may have Arrow’s superhero success to thank for making it onto the airwaves, although Black Lightning isn’t currently in the Arrow-verse.
Who could have guessed when Arrow debuted back in 2012 that it would ultimately spawn a small empire of superhero series for The CW?
Rather, he was reflecting on how truly remarkable the Arrow-verse has become over the years.