The fourth and final season of Superman & Lois had both Lex Luthor and Doomsday, but the acclaimed show had even bigger aspirations for future installments. Starring Tyler Hoechlin and Elizabeth Tulloch, the series was well-received due to its commitment to the small-scale storyline and adherence to the source material. Over the course of the show, several iconic villains have made their way to the small screen, but the creators behind Superman & Lois planned to introduce the ultimate DC Comics villain to The CW.