Arrow took over the DC on The CW mantle in 2012, eventually spinning off into a shared universe of shows which now include The Flash, Supergirl, Legends of Tomorrow, Black Lightning, Batwoman and the upcoming series Superman & Lois.
As mentioned above, Smallville was a super successful series, and any time a beloved show leaves the airwaves fans will want more.
This basic love for Tom Welling’s Clark Kent, Erica Durance’s Lois Lane, Justin Hartley’s Oliver Queen and more of the portrayals of classic (and new) characters who populated the drama only increased when the Arrowverse quickly became its own force to be reckoned with.