The CW has developed a strong reputation for superhero shows, and the Arrowverse has been a tremendous success.
The explanation makes sense, but it’s worth noting that The CW does usually announce renewals at the TCA’s winter press tour.
CW president Mark Pedowitz is “confident” that the Arrowverse shows – Arrow, Supergirl, The Flash, and Legends of Tomorrow – will be renewed.
Coming from the president of The CW, those words carry a lot of weight. Supergirl season 3 continues on Monday, January 15 @8pm. The Flash season 4 continues on Tuesday, January 16 @8pm.