Perhaps there's a plot where an alien symbiote attaches itself to Mary Jane instead of Peter. She starts to develop strange powers and a more aggressive personality. Peter has to figure out how to save her from the symbiote's control. This would put a strain on their relationship as Mary Jane struggles with the new - found power and Peter tries to be the hero she needs.
A unique way to develop their relationship is to have Peter lose his powers for a while. Mary Jane then has to step up and be the protector in some situations. This role reversal would make them see each other in a new light. She could use her wits and charm to get them out of trouble, and Peter would learn to rely on her in a different way. It would strengthen their bond and show that their relationship is not just based on Peter being the hero.
Maybe Peter avoids Mary Jane in the fanfiction because he's afraid of putting her in danger. His life as Spider - Man is full of risks, and he might think that staying away from her will keep her safe.
One reason could be that he's on a dangerous mission. Peter might think that his enemies could use Mary Jane against him. So, to protect her, he decides to keep his distance. For instance, if a powerful villain has threatened to harm those close to Spider - Man, Peter would rather stay away from Mary Jane to keep her out of harm's way.
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.
Another reason is that Mary Jane is an iconic character in the Spider - Man universe. Her relationship with Peter adds an extra layer of depth and emotion to the stories. Fanfictions about them can range from sweet and romantic to action - packed, which caters to a wide variety of readers' tastes.
In most Spider - Man novels, Mary Jane is indeed present. She's not just a love interest but also a strong character in her own right. For example, in some novels, she has to deal with the knowledge of Peter's double life as Spider - Man. This creates interesting story arcs as she struggles with the danger that comes with loving a superhero, and also has her own life and goals that she is trying to achieve. Her presence in the novels helps to humanize Peter Parker and makes the story more than just about a superhero's adventures.
One great fanfiction could be 'Peter and Mary Jane's New Adventure'. It might focus on their relationship in a new setting, like a different city where they have to face new villains together while also dealing with their personal issues.
She could be developed by showing her more independent side. For example, she starts her own small business or gets involved in a community project. This would show that she has her own goals apart from her relationship with Peter.
She could be developed by showing her dealing with more complex emotions. For instance, if she starts to feel jealous of Spider - Man's superhero life taking up so much of his time. This would add depth to her character as she struggles between her love for him and her own needs.