Justice League Action Shorts S01E15 - Plastic Man of Steel

As Lois Lane is close to figuring out that Superman is Clark Kent, Plastic Man poses as Clark Kent. While the ruse works, the three of them are attacked by Lex Luthor in a high tech suit who wants a retraction on the article that was written about him. As Superman was hit by the red sun beam from the high tech suit, Plastic Man poses as Superman to fight Lex Luthor.