“Stargirl” will feature a new, legacy JSA with, from left, Rick Tyler (Cameron Gellman) as the new Hourman, Courtney Whitmore (Brec Bassinger) replacing Starman as Stargirl, Beth Chapel (Anjelika Washington) as Dr. Mid-Nite II and Yolanda Montez (Yvette Monreal) as the new Wildcat. (DC Universe/TNS)