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.
In some fanfictions, a great plot twist is when Venom and Spider - Man find out they are related in some strange way. Maybe they are part of an ancient prophecy or something. Another plot twist could be that the city they are in gets transported to another dimension where the rules are different, and they have to work together to get back. And then there's the plot twist where a character thought to be dead, like Mary Jane or Harry Osborn, comes back as a new super - being and has an impact on the relationship between Spider - Man and Venom.
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 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 Spider - Man's web - slinging abilities affecting the Grimm in RWBY. Maybe his webs are able to hold the Grimm in a way that the Huntsmen and Huntresses in RWBY have never seen before. This could change the way battles are fought. Another could be that Spider - Man has to adapt to the world of Remnant, where the rules of physics and combat are different from his own world. For example, he has to figure out how to deal with Dust, the energy source in RWBY, and incorporate it into his fighting style.
A really cool plot twist was when the symbiote suit first appeared. It seemed like a great addition at first, giving him enhanced abilities. But then it started to take over Peter's mind, turning him into a darker version of Spider - Man. This led to a whole internal struggle for Peter and changed the dynamic between him and his friends and foes.
One exciting plot twist could be that Spider - Man's powers are affected by the Sky High environment. Maybe the high altitude messes with his web - shooting ability. Another could be a character from Sky High getting bitten by a radioactive spider - like creature and becoming a new kind of hero. Or perhaps the villains in both universes team up, forcing Spider - Man and the Sky High heroes to work together in ways they never expected.
One idea could be Agent Venom having to team up with Spider - Man to take on a new super - villain who has the ability to control technology. They start off distrusting each other because of their different methods, but as the story progresses, they learn to work together. Another plot could involve Agent Venom getting infected with a virus that makes him turn on Spider - Man, and Spider - Man has to find a cure while fighting off Agent Venom's attacks. A third idea is that they both discover a secret conspiracy within the superhero community that they have to expose together.
A really cool plot twist could be that there is a parallel universe where Spider - Man and Ghost Rider are enemies. And in the fanfiction, elements from that universe start seeping into their world, causing confusion and making them question their alliance. This would bring in a whole new level of complexity to the story, with alternate versions of themselves causing chaos and making them fight not only external threats but also their own inner demons about who they really are.
One interesting plot twist could be that Venom actually has a change of heart and decides to team up with Spiderman against a greater evil. Maybe there's a new symbiote villain that is far more powerful and menacing, and Venom realizes that only by joining forces with Spiderman can they stop it.
One character that is quite popular to include is Felicia Hardy, also known as Black Cat. She has her own unique relationship with Spider - Man, and her skills as a thief and anti - hero can bring a different flavor to the story. Norman Osborn, the Green Goblin, is another. His history with Spider - Man and his potential influence on the Venom symbiote or its hosts can be a major plot point. Also, Miles Morales, the other Spider - Man in some universes, could be included for a really interesting crossover within the fanfiction world.
One of the most interesting plot twists could be that Peter Parker's friends and family already knew his identity but were pretending not to. This would add a whole new layer of drama and emotion to the story. Another could be that the revelation of his identity was part of a larger plan by a villain to isolate him from his allies. Or perhaps, in the fanfiction, his identity was revealed not by accident but by a powerful magic spell that backfired, leading to chaos in his life and the superhero community.