Another plot twist might be that the bond between Spider - Man and Venom allows them to share powers. So, Spider - Man could gain some of Venom's enhanced strength and agility, while Venom could inherit Spider - Man's spider - sense. This would make their combined form an even more formidable force against their enemies, like the Green Goblin or Doctor Octopus.
One interesting plot twist could be that Venom starts to have memories of Peter Parker's life as Spider - Man. This would create a strange dynamic where Venom understands Spider - Man's motives on a deeper level and might even start to protect the things Spider - Man cares about. For example, Venom could find itself saving Mary Jane from a random mugger because it has a new - found sense of connection to Spider - Man's world.
One exciting plot twist could be Venom actually teaming up with Spider - Man to fight a greater evil. Maybe a new super - villain emerges that is too powerful for either of them alone. Another could be that Venom's host has a change of heart and wants to be a hero, leading to a very different dynamic between him and Spider - Man. And sometimes, there might be a plot twist where Spider - Man is forced to take on some of Venom's powers temporarily, which completely changes the way he approaches battles.
At first, their relationship could be one of mistrust. Spider - Man is used to seeing Venom as a foe. But as they bond, they start to understand each other's pain. For example, Venom might share with Spider - Man how it felt to be an outcast, which Spider - Man can relate to as he often feels alone in his dual life.
Well, perhaps in the fanfiction, Spider - Man bonds with Carnage to save an innocent person. Let's say Carnage has taken a hostage, and Spider - Man discovers that he can form a temporary bond to influence Carnage's actions. He then uses this bond not only to save the hostage but also to try and reform Carnage in some way. It could also be that the bond is a result of a magical spell gone wrong in the Marvel universe that links their fates together.
Well, a cool plot could be that there's a scientific experiment gone wrong that fuses Venom and Spider - Man's powers in an unexpected way. They have to figure out how to control these new combined abilities while also dealing with villains who want to steal their power source. Or perhaps Venom gets amnesia and Spider - Man has to convince him that they were once enemies but now need to work together. There could also be a story where Venom's offspring has a different relationship with Spider - Man, like it's more of an anti - hero sidekick.
One idea could be Venom and Spider - Man teaming up against a new, more powerful symbiote that threatens the city. They have to put aside their differences and use their combined powers to defeat it.
One exciting plot twist could be that Venom actually has a change of heart. Maybe he realizes that he and Spider - Man are both victims in a way, and they end up teaming up against a bigger threat. Another could be that Spider - Man gets infected by a different symbiote that makes him even more powerful, but also more unpredictable, and now Venom has to decide if he wants to fight this new version of Spider - Man or join him.
One interesting plotline could be Spider - Man struggling to control the symbiote's more violent tendencies while still using its power for good. For example, he might accidentally harm an innocent while trying to fight a villain.
One interesting plot twist could be that Ultron hacks into Spider - Man's suit. This would put Spider - Man at a huge disadvantage as Ultron could control his movements or disable some of the suit's functions.
One interesting storyline could be Venom teaming up with Spider - Man in a Homecoming - based setting. Maybe there's a new threat in the city that they both realize they need to face together. For example, a powerful criminal organization that's using advanced technology stolen from Stark Industries. Another could be a Venom - origin story set during the time frame of Homecoming, where the symbiote's arrival on Earth and its connection to Peter Parker's world is explored in a different way than in the official comics or movies.
One idea could be that the OC has a special power that can either enhance or counteract Venom's abilities. For example, the OC might be able to emit a frequency that calms Venom when he's in a rage. Another plot could involve the OC being from a different dimension and getting stuck in Spider - Man's world, and Venom takes an immediate interest in this strange new being. They could start as enemies but gradually form an alliance as they face common threats.