The Avengers are a team of superheroes appearing in American comic books published by Marvel Comics, created by writer-editor Stan Lee and artist/co-plotter Jack Kirby. The team made its debut in The Avengers #1. Labeled "Earth's Mightiest Heroes", the original Avengers consisted of Iron Man, Ant-Man, Hulk, Thor and the Wasp. Captain America was discovered trapped in ice in issue #4, and joined the group after they revived him.

Thor Odinson is a superhero appearing in American comic books published by Marvel Comics. Created by artist Jack Kirby, writer Stan Lee, and scripter Larry Lieber, the character first appeared in Journey into Mystery #83 (1962) and first received his own title with Thor #126 (1966). Thor is an adaptation of the deity of the same name from Norse mythology, and many aspects of Thor's character are based on Norse myth. Comic books featuring Thor have been published across several volumes since the character's introduction.