Who is Superman's greatest enemy? No, it's not
Lex Luthor
The self-proclaimed “Greatest Criminal Mind of Our Time,” Luthor is Superman's arch-nemesis and one of the most dangerous villains he's ever faced. His genius intellect and wealth are his greatest assets, allowing him to develop advanced technology and weaponry to battle the Man of Steel.
Naturally, Superman fears death like most people, but his battle with Doomsday is especially traumatic when considering his powers. Superman is nearly invulnerable to physical attacks, so having had a being beat and stab him to death is even more unnerving, despite Superman's eventual resurrection.
Most incarnations depict Brainiac (alias Vril Dox) as a bald, green-skinned alien cyborg or android from the planet Colu and one of the most dangerous villains in the DC universe, capable of possessing others, inventing extremely advanced weaponry (such as force fields and shrinking rays), physically matching or ...
While Lex Luthor, Brainiac, General Zod, Bizarro, and Doomsday are cited as the most famous of Superman's foes, he has a far more exciting and varied rogues' gallery than many casual fans seem to realize.
For all the allies and enemies that Superman has faced, there's only one that he has openly said he's afraid to face in open combat, and that person is Martian Manhunter.
Most people know about Superman's aversion to Kryptonite. Surprisingly, that isn't even his greatest weakness! In fact, magic circumnavigates all of his biological abilities. No matter what color of sun he's under, no matter what the situation is, magic is extremely effective against Superman.
Why Superman is Afraid of Kryptonite: Superman, the iconic superhero from DC Comics, is known for his incredible strength and ability to fly. However, there is one thing that can weaken and even harm him: Kryptonite.
Also known as the Clown Prince of Crime, the Joker is the arch-enemy of the Dark Knight — one capable of such unthinkable evil that can make even Batman shudder.
During his time on screen, Metro Man never shows genuine fear despite his heavy burden. The only time he appears to have fear - when he realizes he is surrounded by copper and Megamind's plan to kill him looks likely to succeed - is revealed later in Megamind to be fake.
Batman Is Afraid To Be In The Company Of Bats
As a child, Bruce's fear of bats stemmed from falling in a cave where he encountered the animal. He continued to harbor it as an adult, although Bruce used the very fear as his strength. Batman Begins: Bruce Wayne embraces his worst fear.
However, as durable as Superman is, he can still take damage from a few things in the DC universe. If he gets hit by someone as strong or stronger than him, Superman can get hurt, as we've seen the likes of Wonder Woman, Darkseid, and Doomsday hurting and damaging the Man of Steel.
Superman can't take on Darkseid alone. The entire Justice League still struggled to face this celestial being. Every time Superman has faced off with Darkseid it visually ends in a stalemate, although the ruler of Apokolips is still one of Superman's greatest adversaries.
Who is Superman's greatest enemy? No, it's not Lex Luthor or Darkseid. The one Superman fears more than anyone else is himself. He knows he has god-like power and could crush almost anyone and anything with a flick of his hand, so he always worries about losing control.
Daredevil
The most remarkable thing about Daredevil isn't that he's a blind superhero or that he can beat just about anybody in a fight. Not even close. The most remarkable thing about Daredevil is that he easily makes this list of superheroes who have never been killed.
Batman emerges victorious, and from a narrative perspective, Batman v Superman could go no other route. As long-time DC Comics readers know, there's more than enough comic-book precedent for Batman beating Superman.
Superman is routinely one of the first lines of defense against any threat to Earth. The villains Superman regularly fights are evil geniuses like Lex Luthor, monsters like Doomsday that grow stronger from death, energy parasites, and alien warlords such as Mongul, yet Superman regularly manages to defeat all of them.
While Superman himself does not pose a threat, his existence does. Bruce fears Superman because he feels he will bring danger to the planet, which he does albeit indirectly. Zod is responsible for the destruction of Metropolis, but he never would have thought to come to Earth if not for Kal-El.
Superman is immortal as long as he stays exposed to the yellow sun. Yellow Sun radiation is a prime source of power for Superman, and due to its effects, he is practically invulnerable to most forms of damage, and he is able to live seemingly forever. That doesn't mean that Superman can't be killed, however.
While it might be a surprise to hear that Superman is afraid of heights, BridgeClimb's Face Your Fear Expert, Gemma Cribb B Psych (hons), M Psychol (Clin), notes it's very common with 1 in 20 people not liking heights.
The most notable weakness to his name is kryptonite, radioactive slivers of his home world able to reduce him to a severely weakened state. Other wild cards such as overwhelming strength and magic can do real harm to Superman.
Captain Atom has proven in past battles that he is stronger than Superman and has better fighting skills. He can also weaponize red sun radiation, which can weaken Superman like Kryptonite and magic. His sometimes uncontrolled nature has earned him a reputation as one of the most dangerous DC heroes.
Even though Superman is often considered the most powerful character in the DC Universe, Shazam definitely comes close, and he can even beat the Man of Steel. And with a massive power upgrade, there's no question that Shazam can meet Superman blow for blow—despite the upgrade's terrible side effects.
According to DC Comics, not even the biggest Superman fans know how tell when he's furious. Superman, known for his kindness and goodwill, rarely allows his temper to get the best of him. But when he does get angry, he doesn't show it in any spectacular way fans might expect.