Question: Khn'nr is a fictional alien character, who has appeared in numerous comic book series, he is a Skrull sleeper agent posing as the Kree Captain Mar-Vell, also known as Captain Marvel, the name of several fictional superheroes appearing in American comic books, published by which organization?
Sentence (from "Captain Marvel (Marvel Comics)"): Most of these versions exist in Marvel's main shared universe, known as the Marvel Universe.
Relevant evidence: No