Captain America is one of Marvel's most iconic heroes. Created by Joe Simon and Jack Kirby in 1941, Captain America made his first appearance in Captain America Comics #1, just before the United States entered World War II. Since then, he has become a symbol of patriotism and justice in the Marvel Universe. Captain America is the alter ego of Steve Rogers, a frail young man who volunteered for a secret experiment that turned him into the ultimate super soldier. As a result, he has superhuman strength, endurance and agility, as well as exceptional leadership skills. With his indestructible shield, Captain America is a formidable fighter on the battlefield. Over the years, Captain America has battled many dangerous villains, including the evil Red Skull and the terrorist organisation Hydra. He has also led the Avengers on several occasions, becoming one of the most important members of the team.
Doomsday is a comic book character created by DC Comics and is known to be one of the publisher's most powerful and feared villains. He is a cosmic monster who has come to Earth with the goal of destroying everything in his path and becoming the supreme being in the universe. Doomsday has a number of supernatural powers, including superhuman strength, immortality and the ability to regenerate any part of his body. He is also virtually indestructible, making him a formidable foe for any hero who confronts him.