"Immortals" is composed in the key of
F-sharp minor. Disney asked the band to write and perform the song for the film's sequence in which the
Big Hero 6 team is transformed from a group of super smart individuals to a band of high-tech heroes. "We went over to Disney and met with the directors," bassist
Pete Wentz recalled. "They explained the story to us. It was insane how much it lined up with the way our band saw the world." Wentz later stated, "Disney asked the band to come in and talk to the directors so we did that.... and we discussed the scene and what our song would attempt to do. Then we went home and wrote and sent it to them- it was a back and forth from there. It was interesting to be a part of because our song was just a small part of a bigger thing and the challenge to just be a part of the fabric. It was a really cool experience." Vocalist
Patrick Stump said that the song's title was inspired by "the idea of this kid stepping up on behalf of his brother. Your victories aren't exclusively yours, so the fact that all of these people are coming together to help him get to the finish line is really exciting." Wentz further elaborated: "They're testing out their new super suits for the first time in the scene. Some of it works—some of it doesn't. You get the sense that they're stepping into a bigger role. The story's in the DNA of Fall Out Boy. It is an authentic story and it's who our band is—we've always identified with the underdog." The album version and film versions slightly differ: on the film version the percussion "is all marching-band strident, but on the album version much of that power is stripped away." A remix featuring
Black Thought of
The Roots appeared on the remixed album
Make America Psycho Again. == International versions ==