10. Hulk
Dr. Bruce Banner is one of the most powerful superheroes in the world. When he is Dr. Banner, he is one of Earth's most brilliant scientist, specializing in gama radiation, biology, chemistry, engineering, physiology, and nuclear physics. That's just him as a man, but Dr. Banner is so much more. When he gets mad enough, he transforms into The Incredible Hulk. A creature that not only poses super strength, endurance, regeneration abilities, super human speed and leaping ability. The best part about The Hulk's powers are the madder he gets, the more powerful he becomes. It's scary to even think about. The Hulk has proved time and time again he's one of the most powerful beings in the superhero universe. His weakness? Taking advantage of him while he's still Dr. Bruce Banner and kill him while you can. Although The Avengers movie proved that could be a problem as Dr. Banner explained that he once got so low that he tried to take his own life but The Hulk wouldn't let him. Now that could be a problem for the rest of the villains in the Marvel Universe.