Routh actually made his Arrowverse debut over in the third season of Arrow and was one of the longest-running major Arrowverse heroes by the end of his final season of Legends.
The Rookie will be Brandon Routh’s big return to TV following the end of his starring run on Legends of Tomorrow.
Ray Palmer willingly left the time travel adventures behind to start a new life with his new wife (played by Routh’s real-life spouse Courtney Ford), but Routh himself didn’t actually want to leave Legends.