A great plot twist could be related to their secret identities. When they body - swap, they might accidentally reveal things about their true selves that they were trying to keep hidden. For example, Mary Jane in Spider - Man's body could let slip some information about Peter Parker's personal life while trying to be Spider - Man. Or Spider - Man in Mary Jane's body could unknowingly expose something about her that she was keeping private in the acting world. This would create a lot of chaos and interesting storylines to resolve.
One interesting plot twist could be that while in each other's bodies, they have to deal with their respective personal relationships. Mary Jane in Spider - Man's body might struggle to handle his superhero duties and his complex relationships with villains. Meanwhile, Spider - Man in Mary Jane's body has to deal with her acting career and the pressures that come with it. Another plot twist could be that they start to understand each other on a much deeper level. Spider - Man realizes how difficult it is for Mary Jane to be constantly in the public eye and worried about his safety, and Mary Jane gains a newfound respect for the challenges he faces as a superhero.
Perhaps a plot twist where the body - swap is not a random accident but part of a villain's plan. The villain might be using this to get closer to Spider - Man or to disrupt his life. Mary Jane in Spider - Man's body has to figure out the villain's motives while also dealing with the physical and mental challenges of being a superhero. Spider - Man in Mary Jane's body has to use his wits and her resources to try and stop the villain's plan from within the acting community.
One interesting plot twist could be that while in Spider - Man's body, Jane discovers a new side of Peter Parker's life. She realizes the daily struggles he has in balancing his superhero duties and personal life. Maybe she accidentally reveals Spider - Man's identity to some of his enemies while trying to handle a situation in a different way than Peter would. This could lead to a whole new set of challenges for both of them as they try to fix the mess and get their bodies back.
Peter's colleagues at the Daily Bugle would find it very strange. J. Jonah Jameson would probably think it's some sort of elaborate prank by Spider - Man. He might try to expose this 'new Spider - Man' who is actually Mary Jane in his body. Mary Jane's family and friends would also be concerned about her well - being. They would try to communicate with her, but it would be difficult because she's in a different body. And Spider - Man's other friends in the superhero community might initially suspect that he's been mind - controlled or something similar, which would lead to a lot of drama and attempts to 'fix' him.
In 'The Unseen Mary Jane', the plot twist where Mary Jane discovers she has latent superpowers is really cool. It completely changes the dynamic of her relationship with Spider - Man. Another one is in 'MJ's Secret Identity' where it's revealed that Mary Jane has been secretly working with an underground superhero organization all along.
One idea could be Mary Jane starting her own investigative journalism project related to Spider - Man's enemies. This would put her in danger and force Spider - Man to protect her while also trying to keep his identity a secret from her new inquiries.
In some Spider - Man fanfictions, Mary Jane being pregnant can add a whole new layer of drama. It could mean that Spider - Man has to balance his superhero duties with being a soon - to - be father. Maybe he'll worry about protecting his family more than ever, and there could be new villains who target his unborn child or Mary Jane to get to him.
Well, one interesting plot could be that they have to keep their identity swap a secret from their enemies. Spider - Man in the Wasp's body would have to figure out how to use her shrinking and flying abilities to fight crime, while the Wasp in Spider - Man's body would struggle with his web - slinging and enhanced strength but also use her intelligence to come up with new strategies.
A great plot idea would be Mary Jane being kidnapped by one of Spider - Man's enemies who wants to use her as bait. Peter has to use all his skills and intelligence to rescue her without revealing his identity to the kidnapper. Also, Mary Jane could start training in self - defense secretly and ends up helping Spider - Man during a fight without him knowing it was her at first.
One interesting plot twist could be that the body swap causes the characters to understand each other's perspectives in a completely new way. For example, if 7 of 9 swapped with a more emotional character, she might struggle with handling all the new feelings and it could lead to some comical or poignant moments as she tries to navigate the new emotional landscape while the other character in her body has to deal with her Borg - like efficiency and lack of emotional response in certain situations.
A possible plot twist is that Pikachu, while in Ash's body, discovers the responsibilities and pressures that Ash faces. He might start to understand why Ash sometimes makes certain decisions during battles. This could lead to a deeper bond between them once they swap back.
Let's start with the Avengers. In Spider - Man's body, Jane would interact with the Avengers in a unique way. She would bring her scientific knowledge to the table, which could be very useful in some situations. However, her different personality might cause some friction. For example, Iron Man might be intrigued by the new 'Peter' but also a bit annoyed at the different approach. Captain America might see the change in 'Peter' as a sign of him growing up in a different way. On the other side, Spider - Man in Jane's body would have to deal with Asgardian friends and foes. He would befriend some of the more adventurous Asgardians, but also face the jealousy of some who don't like this 'outsider' in Jane's body. Overall, their body swap would create a lot of chaos and interesting changes in their relationships with other characters.