Willie returns in the second season, no longer a nerd. The new Willie lost the nerd talk, now buff, shed his glasses. He still has a crush on Blade when he send a message to her in the girl's locker room with his powers that said "I still love you". When Terry visits him, Willie accidently reveals his power when Terry throws a glass of water at him, and stops it in mid air. After that Willie escapes from juvie to get his revenge. Willie visits the school, defeats Nelson in a fight, and tries to take Blade by force. But then Batman comes in and the fight begins. At first Willie is tough to beat. But then Batman throws a bat-a-rang at him, causing Willie to create a tornado. Not watching when a tree hit Willie knocking him out cold. Then Willie is return to juvenile with a helmet on him that prevents him from using his powers to escape.
He serves as the main villain in the season one episode Golem and season 2 episode Revenant. He might return in the new Batman Beyond comic books but it is unknown yet.