OK so i'm starting this new thing kind of like dc's earth-3 (where every villan is a hero and every hero is a villian) this is the evil Spider-Man and good venom origin stories that i came up with :
Bad Spidey: Richard Parker II was orphaned at a young age when his abusive father beat his mother to death in a fit of drunken rage (while he was watching) and he commited suicide shortly after being incarcerated. Richard was later taken under the care of his aunt and uncle. His uncle was a thief and trained young richard to become a criminal like him. During a science expo at school richard broke into one of the labs with the intention of stealing some sort of "priceless object" that he overheard one of the proffessors talking about. There he saw a small container which had a little spider in it richard thought he could play a prank on one of his classmates with it. After freeing the spider he was bit and felt unwell so he went home. While there, richard felt powerful and started to discover his spider powers. Using these powers he and his uncle went on many heists togheter and were unstoppable. Richard later felt that he was powerful and experienced enough to go on his own so he started his own crimespree robbing banks, museums and mugging civillians and adopted the criminal identity of SPIDER-MAN. After hearing about his uncle being gunned down by the police richard swore revenge, commiting several crimes and killing anyone who tried to stop him.
Good Venom: Being beaten up by school bullies at a young age eddie brock always had a strong intolereance against injustice and promised to rid the city of crime. He spent his years learning martial arts and spent alot of time bodybuilding to mold himself into the crime fighting cop he had dreamed to be. After graduating college he fulfilled his dream and became a police officer. He instantly earned popularity among his fellow officers by being the only one able to stop the many crimes of the super criminal spiderman. Frustrated, spider-man retaliated by killing some of his friends and his fiancee: Gwendolyn Stacy, sending a message that he is next. Sad, terrified and full of rage brock attempted suicide by jumping off a building. After hitting the ground he noticed that he didn't even have a scratch on him and that some mysterious black goo started to take over his body. Being more powerful than ever, brock was under the impresdion that he had been given a second chance by god. He swore to use this newfound power for justice and for another goal: Kill Spider-Man!!. Adopting the super-hero identity of: VENOM
The two became arch enemies. Fighting each other for years. Their rivalry ended when venom killed spider-man by hanging him by his own web.
If you have any hero-villain ideas of your own please contribute.