Spiderman's agility and web - slinging abilities could be combined with She - Hulk's super strength. For example, Spiderman could use his webs to create a net and She - Hulk could throw it with her great strength at enemies. Or Spiderman could swing She - Hulk around to gain more momentum for her attacks.
It could be a new super - villain created specifically for the fanfic. Maybe a scientist who has developed a formula that gives him the ability to manipulate energy and he wants to use it to take over the city. His powers would pose a threat to both Spider - Man and She - Hulk.
Well, one possible storyline could be them teaming up to fight a new and powerful villain in a rather comical way. Maybe the villain has a unique power that causes chaos in the city, and Spider - Man's agility combined with She - Hulk's strength make for an interesting dynamic in combat.
There could also be a plotline where they both enter a mysterious tournament. They have to fight other superheroes and villains in a series of battles. Along the way, they learn more about each other's capabilities and form a stronger bond.
One interesting 'Spiderman and She - Hulk' fanfiction could be one where they team up to fight a new supervillain in New York. In this story, Spiderman's agility and She - Hulk's strength complement each other, and they have to learn to work together despite their different fighting styles.
Another plot could be a more personal story. Spiderman and She - Hulk start training together. During the training sessions, they learn more about each other's insecurities and strengths. Spiderman might be dealing with the pressure of being a friendly neighborhood hero and She - Hulk could be struggling with her dual identity. Through their friendship, they help each other grow as superheroes and as people.
One possible plot could be that they have to deal with the media frenzy. Spiderman's identity might be at risk of being fully exposed because of his new high - profile relationship with She - Hulk. They could also team up to fight villains who target them specifically because of their union, like a villain who wants to use their combined powers for evil.
Their relationship could start as a simple partnership. They meet while fighting crime and gradually start to respect each other's abilities. As they work together more often, they become friends. For instance, Spiderman might initially be a bit intimidated by She - Hulk's strength, but as he sees her use it for good, he warms up to her.
One reason could be a misunderstanding. Maybe some villain has tricked Hulk into believing Spiderman is a threat. For example, the villain might have faked some evidence to make it seem like Spiderman was planning something bad against Hulk or his friends.
First of all, 'lemon' content itself should be avoided as it often involves adult and inappropriate themes. Also, avoid fanfictions that might misinterpret or disrespect the original character of She - Hulk. For instance, if a story changes her core values or personality in a way that doesn't fit with the Marvel canon, it's not a great read.