James Gunn's Superman introduced a strong but vulnerable Man of Steel, meaning that David Corenswet's DCU hero wouldn't be unbeatable in the Marvel Cinematic Universe. In Gunn's Superman, David Corenswet's Kal El battles Ultraman, a firebreathing kaiju, The Engineer's nanobots, and Lex Luthor's soldiers. He ultimately wins each of his battles, but he struggles all the way to the top.