(I don't own the rights to any of these characters I'm just a fan making a story, I will be using characters and things from other comic book franchise like Marvel comics, Image comics, WildStorm comics and The Boys as well as I may use the names of characters, backstories and things within this story)
Earth 20: Superman's Origins
There was once a peaceful world that was known as Krypton which was the home world for a technology advance race called the Kryptonian's who were governed by the Ruling Council and their society was different from many other races in the Universe as unlike other races Kryptonian's are not born though natural means instead they are created in the Birthing Matrix which was a chamber where Kryptonian children are artificially created and they are raised in separate from their parents until they reach a certain age.
Krypton had always had a bad relationship with the Dheronian's who were from the world known as Dheron which was a nearby planet to Krypton and they have hated each other simply because of their various differences, such as Democracy vs Monarchy and how life should be lived which eventually led to a war between the two world's
The war between Krypton and Dheron lasted for many years with casualties between the two world's were in the thousands which cause both the Ruling Council of Krypton and the monarchy of Dheron to finally call a end to the war however not everyone wanted the war to end because they wish to avenge their fallen friends and family like General Jax-Ur who was a distinguished soldier in the Kryptonian military and he wanted to avenge all of the lives of the Kryptonian's that had been killed by the Dheronian's during the war.
Jax-Ur believed that the current Ruling Council was weak and so that Krypton needed a stronger leadership to led Krypton into becoming a great galactic empire in the Universe which it was destined to be meaning himself and Jax-Ur became even more certain of this when he had discovered that the Ruling Council had a secret weapon that they could have use to completely destroy the Dheronian's and won the war for Krypton at the very beginning of the war against the Dheronian's and the secret weapon was a creature known as Doomsday who possessed unimaginable power and bloodlust.
Many years ago on Krypton there was a civil war that was started by a rebel group calling itself Black Zero so the house's that were members of Krypton's Science Council like the famous House of El work together to create a weapon to stop Black Zero which led to the creation of Doomsday to put a end to the civil war and protect Krypton. However their creation proved to be to violent to be controlled and to powerful to be destroyed so the Ruling council of Krypton at the time used a device which was created by Val-El call the Phantom Zone Projector which can send anyone or anything to the Phantom Zone an intra-dimensional realm outside the normal space/time continuum which would later become a prison where the Ruling Council would send the worse criminals making Doomsday it's first ever inmate.
The current Ruling Council was too afraid to unleash Doomsday from the Phantom Zone on to Dheronian's fearing that what if they did free Doomsday but they couldn't be able to send him back to the Phantom Zone and the creature may also end up destroying them as well. Jax-Ur gathered everyone who also share in his vision for a grand military government Krypton and they call themselves 'The Sword of Rao' after their Sun-God Rao however the Ruling Council was able to stop to them thanks to the help from Jor-El who was the great grandson of Val-El, one of Krypton's greatest scientists and the former best friend of Jax-Ur.
Afterwards the Ruling Council sentenced Jax-Ur and most of his followers to the Phantom Zone but not before Jax-Ur vowed vengeance and he claimed that they have doomed Krypton as the war had left both Krypton and Dheron defenses weakened and neither of them were prepared when Brainiac came to their world's.
Brainiac was a artificial intelligence from the Planet Colu that was originally called 'C.O.M.P.U.T.O' and it was designed to gather date and study all forms of life however it went rogue and left the Planet Colu knowing that if it stay it's creator and the other scientists would be able to destroy it and once it left Planet Colu it created itself a spaceship and a physical body which it designed to look like it's creator Vril Dox and gave itself a new name Brainiac and afterwards Brainiac continue it's original mission to gather knowledge which has led it to create a device that can struck cities and people so Brainiac could transportation the small orbs on its Skull Ship so Brainiac could continually study the lifeforms and exterminate them.
Brainiac choose Krypton first simply because it was a bit more weaker then Dheron because of the lost of Jax-Ur and his followers and when Brainiac arrive it chose one of Krypton's three greatest cities known as Kandor to be added to it's collation and sent it's drones to gather everyone who it thought was useful and those who it didn't were killed while Brainiac also hack into every computer system of Krypton to downloaded all of it's knowledge. Once Brainiac was finish it then fired a blast from it's Skull Ship into the Planet's core triggering it's destruction like it has done to every other world it has come to as Brainiac wanted to make the knowledge that it had gathered only available to itself and Brainiac then travel to Dheron to repeat what it had just done.
However a few weeks before Krypton's destruction Jor-El had found out that Brainiac was heading towards his world but when Jor-El try to warn the Ruling Council they simply ignored his pleas for evacuation and later expelled him from Krypton's Science Guild so with the little of restores that Jor-El had he was able build a small spaceship and on the day that Brainiac had arrive, Jor-El and his wife Lara Lor-Van sent their baby son Seg-El who was name after Jor-El's father and he was the first Kryptonian to be born though natural means after centuries to world known as Planet Terra. Jor-El had discovered the planet because years ago he had sent out a satellite into space for research and Seg-El would be able to blend in with the inhabitants of Terra who are call Human's as they look identical to Kryptonian's and because Planet Terra had a yellow sun unlike Krypton's which had a red sun there were side effects on Kryptonian Physiology which were that the yellow sun radiation can grant Kryptonian's incredible powers.
Jor-El also made sure that Seg-El would know about his family's legacy by giving him a special Crystal which could transform into a large fortress that contained many of Kryptonian technologies and a special orb which Jor-El had originally created for the Ruling Council back during the war against Dheron with it purpose being able to contain a large amount of knowledge as the Ruling Council had intended to use it to copy all of Dheron's knowledge to use against them but instead Jor-El had use it to copy all of Krypton's knowledge before Brainiac downloaded it into itself.
When Seg-El's spaceship reach Planet Terra it landed in the United Kingdom of Albion in a forest where he was founded by Robert and Claire Kingsley who were camping nearby and when they found the baby Seg-El in his spaceship they decided to adopt him and gave him the name of Colin Kingsley him and they raised Colin as their own and taught him their values.
Colin grew up happily thanks to his good parents and to him having great friends and Robert and Claire eventually told Colin the truth of his origins when he was old enough however Colin had always know that he was different from everyone else because of his incredible powers which he secretly uses to help his family on their farm but only there as Robert had told Colin that other people may be afraid of him because of his powers as while there were beings back during the second world war who possessed superpowers like him expect they weren't on the same level as Colin or the fact that he was a alien.
Colin traveled the world for a bit until he used the Crystal that he had found inside his spaceship which his father Jor-El had given him and he travel in the direction which the Crystal glowed which led him to the Bermuda Triangle where he then use it to create a fortress of solitude and had it combine with the orb of knowledge as all forms of Kryptonian technology was capable of merging with any other forms of Kryptonian technology as well as even other technologies that isn't Kryptonian.
Colin eventually moved to the big city known as Camelot where he used his intellect and knowledge of Kryptonian technology to start his own company called 'Kingsley Technologies' and it was also there in Camelot where Colin became the superhero known as 'Superman' because of the symbol on Colin's Superman costume which was actually Kryptonian armor and it also had the symbol for the House of El on the chest which looked like a 'S' inside a diamond shape shield however on Krypton it wasn't a 'S' instead it is the Kryptonian symbol for hope.
Not to long after Colin met other people who were highly skilled fighters and some also possessed super powers similar to his own like Maxima who was once a queen before being exiled from her home planet Almerac and when she arrived on Terra she became known to the world as Wonder Woman and whom Colin fell in love with and married, Timothy Fox who was known as Batman, Carol Ferris who was known as the Green Lantern, Eddie Thawne who was known as the Flash, Teth-Adam who was known as the Mighty Adam, J'emm J'axx who was a Red Martian from Mars, Inza Cramer who was known as Doctor Fate, Lean Luthor who was known Ultrawoman and many other superheroes and together they became known to the world as the 'Knights of Justice'.
This version of Superman base off 'Superman: True Brit' where like this Superman his spaceship landed in England and he is found by the Clarks Family who gave him the Colin because after viewing a headset video that they inside the spaceship and learn of Superman origins, but mistake 'Kal-El' for 'Colin' however i decided to make some differences
In this universe Carol Ferris was chosen to become a Green Lantern instead of Hal Jordan
In the Flash TV show Eddie Thawne is an ancestor of Eobard Thawne aka the Reverse-Flash
In DC Comics Black Adam was originally called the Mighty Adam until he turn evil and rename Black Adam however this version never did
In DC Comics Jemm is a Saturnians from Saturn who are descended from an underclass of worker clones created by ancient Martian explorers however in the Young Justice TV series which takes place on Earth 16 J'emm J'axx is a Red Martian from Mars instead
In DC Comics Inza Cramer was is the girlfriend and later wife to Kent Nelson, she would take up the mantle of Doctor Fate however i'v seen that in the Injustice Universe she was Doctor Fate before Kent Nelson took up the role
In DC Comics Lean Luthor is the sister of Lex Luthor and she became Ultrawoman during DC Rebirth in the Superwoman Comic