Well, identity is a big theme. Peter is used to being just Spider - Man, but now as Venom, he has to re - evaluate who he is. There's also the theme of power and corruption. The power of Venom can be very alluring, and some fanfictions explore whether Peter will be corrupted by it. Additionally, there's often the theme of acceptance, both from himself and from those around him.
In 'Peter Parker is Venom' fanfiction, a frequent theme is the exploration of new powers. Peter has to learn how to use the unique abilities that Venom gives him, like enhanced strength and the ability to climb walls in a different way. Another theme is the moral dilemma. He has to decide what is right and wrong when he has this darker side. And relationships also play a part, as he has to figure out how to interact with people like Mary Jane or Aunt May while being Venom - Peter.
One common theme is the struggle for control. Peter has to deal with the often - aggressive nature of the Venom symbiote, which can lead to some intense internal battles. For example, in some stories, the symbiote might try to take over Peter's mind during a fight.
At first, it would be really rocky. Peter would be very wary of Venom given their past encounters. But as Venom shows his more caring side in the adoption, Peter would start to trust him a bit. They'd have to learn to communicate, which would be difficult because of Venom's different way of thinking.
Another theme is the struggle between normal life and superhero life. Peter has to deal with school, homework, and teenage problems while also being Spider - Man. Fanfictions often show how he manages to juggle these two very different aspects of his existence.
In a fanfiction where Peter Parker becomes Venom, it could be due to a scientific experiment gone wrong. Maybe Oscorp was working on a new symbiote project, and Peter, being the curious and heroic type, gets involved accidentally. The transformation would change his personality, making him more aggressive at first as he struggles to control the new power. He might initially see the symbiote as a curse but later learn to use it for good, in a different way than he does with his Spider - powers.
Yes, there are quite a few. You can start by looking on fanfiction.net or Archive of Our Own. There are many talented writers who explore the concept of Peter Parker being Venom in different ways. Some might focus on how he copes with the new powers and the dark side of Venom, while others could be more about the unique adventures he has as Venom - Peter Parker.
One common theme is identity crisis. Peter has to come to terms with being related to Venom, which is quite different from his normal self - image as just Spider - Man.
Mary Jane could be a great addition. She could be the one who helps Peter deal with the emotional turmoil of having Venom as part of him. Another good character is Ned. He could be the tech - support, trying to find ways to control or enhance Venom's powers. And of course, there's Doctor Octopus. He could be a great villain in the fanfiction, either trying to steal Venom's powers or team up with it against Peter.
One common theme is his relationship with other characters in the Spider - Man universe, like his interactions with Tony Stark or Ned Leeds while being in a 'bottom' role. It often explores the more vulnerable and emotional side of Peter.
One common theme is self - discovery. As Peter is a transgirl, she has to figure out who she really is and come to terms with her identity. Another theme is acceptance, both self - acceptance and acceptance from others like her friends and family. There's also the theme of balancing her new identity with her superhero life. How can she be Spider - Man while also being true to herself as a transgirl? And often, there's a theme of facing discrimination or misunderstanding in society due to her being transgender and a superhero at the same time.
Another theme is the use of Peter's scientific knowledge. Since he's a genius, in these fanfictions, he often uses his knowledge to innovate in his business as a CEO and also to create new gadgets for his superhero activities. For example, he might develop new web - shooter designs in his company's lab.