When working on films with established musical identifiers, Elfman will often incorporate original themes in addition to his own thematic material. Examples include Lalo Schifrin's main theme and "The Plot" from the original for ""; John Williams' theme for "Superman", the Hans Zimmer/Junkie XL theme for "Wonder Woman" and his own original "Batman" theme for "Justice League;" the "Welcome Christmas" song from the 1966 "How the Grinch Stole Christmas!" for "The Grinch"; and "Casey Junior," "Pink Elephants on Parade," and "When I See an Elephant Fly" from Disney's original 1941 animated film for "Dumbo".