A third storyline could involve a scientific experiment gone wrong that somehow links Elsa's magic and Spiderman's powers. This causes them to be able to share each other's abilities temporarily. They have to learn to control these new combined powers while also facing a villain who wants to use this power - linking phenomenon for his own evil purposes.
In some fanfictions, the story could start with Spiderman saving a girl from a vampire attack. But then he realizes that the vampire has a strange symbol on its body that is related to a Transformer cult. Spiderman delves deeper into this mystery and discovers that there is a plot to use vampire blood to power a doomsday Transformer device. He has to race against time to stop this from happening. Along the way, he may face many challenges, including other vampires who are loyal to the cause, and some Transformer - like guardians who are protecting the device for their own reasons.
Perhaps there is a powerful artifact that both Spiderman and the Avengers are after. They end up in a conflict over it. Spiderman, with his street - smart ways, tries to outwit the Avengers and get the artifact for himself, believing he can use it for good in his own way.
Well, in some fanfictions, Elsa might give birth during a time of crisis. For example, an enemy could be approaching Arendelle while she's in labor. This would add a lot of drama and tension to the story. The people of Arendelle would have to protect Elsa and the soon - to - be - born child. And after the birth, the child could be seen as a symbol of hope for the kingdom.
Perhaps there's a power - stealing device in the fanfiction. It's stolen by a villain and used on the Avengers, but Gwen is immune. So the Avengers, now with reduced powers, end up fighting Gwen who is trying to get the device back. Or it could be that Gwen discovers a threat to her world that the Avengers don't believe in, and they try to stop her from taking action, leading to a conflict.
One possible storyline could be that Spiderman and Batgirl team up to fight a common enemy. Maybe a new super - villain has emerged in Gotham that has some connection to New York, so they join forces. Their different skills, like Spiderman's web - slinging and Batgirl's martial arts, would make for an interesting dynamic in combat.
Maybe in the fanfiction, Lucina discovers a way to travel to Spiderman's New York. There, she is initially confused by the modern world but Spiderman helps her adapt. They team up to stop a new villain who is causing chaos in both their worlds. The story could explore how their different skills and personalities complement each other.
One possible storyline could be that Spiderman, while on a mission in a strange dimension, encounters Morrigan. They initially clash due to their different natures. Spiderman is used to protecting the innocent in his city, while Morrigan has her own motives in her world. But as they face a common enemy in this new dimension, they start to work together. Spiderman teaches Morrigan about the value of selfless heroism, and Morrigan shows Spiderman some unique combat techniques from her realm.
Well, perhaps Spiderman is poisoned by a new type of toxin from a villain. The Avengers then scramble to find an antidote. Black Widow uses her espionage skills to track down the origin of the toxin, while Hulk, in his Banner form, tries to analyze it scientifically. Thor might also use his Asgardian knowledge to see if there are any magical cures. In the meantime, they keep Spiderman comfortable and safe from further attacks.
Maybe they team up to train new superheroes. They could share their knowledge and skills, like Spiderman teaching about using the environment to your advantage and Supergirl showing how to control super - strength. This would create a story of mentorship and cooperation between two very different heroes.
A possible storyline could be that they are all framed for a crime they didn't commit. They have to work together to clear their names while also dealing with the real culprits who are trying to keep them distracted. This would involve a lot of action as they fight off other villains who are after them and also do detective work to find the evidence to prove their innocence.