Suggestions by @super_wahrrior

Scorpius (Farscape)

as Thanos in Other Fictional Characters as Marvel and DC Characters

Sauron (Middle-earth)

as Thanos in Other Fictional Characters as Marvel and DC Characters

Zim (Invader Zim)

as Kang the Conqueror in Other Fictional Characters as Marvel and DC Characters

Metal Sonic

as Ultron in Other Fictional Characters as Marvel and DC Characters

Marco (Animorphs)

as Beast Boy in Other Fictional Characters as Marvel and DC Characters

Jake Berenson

as Beast Boy in Other Fictional Characters as Marvel and DC Characters

Catboy

as Blue Ear in Other Fictional Characters as Marvel and DC Characters

Tracker (PAW Patrol)

as Blue Ear in Other Fictional Characters as Marvel and DC Characters

Koala Kong

as Red Hulk in Other Fictional Characters as Marvel and DC Characters

Frank Coutelle

as Red Hulk in Other Fictional Characters as Marvel and DC Characters

Cranky Kong

as Hulk in Other Fictional Characters as Marvel and DC Characters

Zeus (Disney)

as Zeus in Other Fictional Characters as Marvel and DC Characters

Ben Tennyson

as Beast Boy in Other Fictional Characters as Marvel and DC Characters

Homelander

as Superman in Other Fictional Characters as Marvel and DC Characters

Willem Dafoe

as Main Villains (2000s) in What if Indiana Jones was the American James Bond?

Jason Momoa

as Main Villains (2020s) in What if Indiana Jones was the American James Bond?

Paul Walker

as Indiana Jones (2000s) in What if Indiana Jones was the American James Bond?

Christopher Lee

as Henry Jones Sr. (2000s) in What if Indiana Jones was the American James Bond?

Ed Boon

as Producer in Marvel vs DC: The Video Game

Darkseid

as Lawful Evil in Sorting Fictional Characters by Morality