Quasar is a fictional superhero appearing in American comic books published by Marvel Comics. He is one of Marvel's cosmic heroes, a character whose adventures frequently take him into outer space or other dimensions. However, Quasar deviates from the archetype of the noble, dauntless alien set by such Silver Age cosmic heroes as the Silver Surfer, Adam Warlock and Captain Marvel (Mar-Vell) in that he is an everyman. He starred in an eponymous monthly ongoing series written by Mark Gruenwald that ran for sixty issues beginning in 1989 and has served as a member of The Avengers.

Adam Warlock is a character appearing in American comic books published by Marvel Comics. The character first appeared in Fantastic Four #66–67 created by Stan Lee and Jack Kirby, originally named Him. The character would later be significantly developed by Roy Thomas and Jim Starlin. Debuting in the Silver Age of Comic Books, the character has appeared over several decades of Marvel publications, and starred in the titles Marvel Premiere and Strange Tales as well as five eponymous volumes and several related limited series.