Gladiator is a fictional character appearing in American comic books published by Marvel Comics. Gladiator's name, Kallark, is a combination of Superman's Kryptonian and human names: Kal-El and Clark Kent. The character first appeared in Uncanny X-Men #107
(Oct. 1977). Since then, he has been periodically featured in X-titles, Fantastic Four, Rom the Spaceknight, Silver Surfer, Nova, and New Warriors. His origin was revealed in War of Kings: Warriors #1
(2009). Following the conclusion of The Thanos Imperative, Gladiator has appeared as a member of the titular team in Annihilators #1
-4 (Mar-Jun 2011) and Annihilators: Earthfall #1
-4 (Sept-Dec 2011).