A possible plot could be that there is a threat that affects both Naruto's world and Spider - Man's world. But Naruto, due to his lack of understanding of Spider - Man's abilities, neglects him when they first meet. Spider - Man then has to work on his own to try and stop the threat. As he does so, Naruto starts to see the value in Spider - Man's actions. Eventually, they come together to defeat the common enemy. This kind of plot would show the growth of Naruto's character from neglecting to accepting Spider - Man.
The plot could start with Spider - Man being transported to Naruto's world. Naruto, being used to his own type of power and people, doesn't take Spider - Man seriously and neglects him. As the story progresses, Spider - Man starts to solve some problems in the ninja world in his own unique way. This makes Naruto's friends interested in him, which in turn makes Naruto jealous or curious. This could then lead to a change in Naruto's attitude towards Spider - Man and drive the plot forward.
One way it could work is if there's a misunderstanding. For example, Spider - Man tries to help Naruto's village but his methods seem too strange to Naruto. So Naruto just ignores him thinking he's a nuisance. Then the plot could revolve around Spider - Man trying to clear the misunderstanding and gain Naruto's trust.
Well, it could be about a scenario where Naruto, in a crossover universe, simply ignores Spider - Man. Maybe Naruto is so focused on his own ninja world problems that he doesn't pay any attention to this new superhero in his midst. He could be too busy with things like protecting Konoha or dealing with the Akatsuki to even notice Spider - Man's presence.
The plot could revolve around a villain who is immune to Naruto's normal attacks but is vulnerable to Escanor's power. So Naruto has to fully embrace this new power source. Along the way, he might meet characters from Escanor's world who help him understand the power better. There could be a lot of action scenes where Naruto uses the power in creative ways, like using Escanor's 'Rhitta' weapon in combination with his kunai. And there could be a sub - plot about Naruto's friends being a bit jealous or worried about this new power he has.
In terms of plot, it could start with Naruto being transported to a Grimm - like world. Then he has to figure out how to survive using his ninja skills. Maybe he teams up with some Grimm - like characters who are actually good, and they fight against the evil forces together.
Spider - Man's spider - sense could be a great asset when combined with Arrow's combat skills. The spider - sense could alert them both to incoming danger, allowing Arrow to prepare his next shot while Spider - Man positions himself for an attack. Also, Spider - Man's strength could be used to carry Arrow to higher vantage points for better shooting positions, or to quickly move him out of harm's way during a battle.
The team dynamics would depend on the situation. In a combat situation, Spider - Man could use his spider - sense to detect threats early and alert the Avengers. He could then use his web - slinging to quickly get in and out of danger, while the Avengers engage the main threats directly. For example, if they were facing a group of powerful robots, Spider - Man could web up some of the smaller ones and disable them, while Iron Man fires his repulsors at the bigger ones, Captain America commands the overall battle, and Thor smashes any remaining threats with his hammer. Off the battlefield, Spider - Man might be a bit in awe of the Avengers at first, but as time goes on, he could become more of an equal and contribute his own unique perspective on hero - related matters.
A possible way for a crossover to work is through a shared villain. Let's say a powerful dark wizard somehow gets hold of some Stark Industries tech and combines it with dark magic. This new threat catches the attention of both Spider - Man and Harry Potter. Spider - Man would bring his scientific knowledge and superhero skills, while Harry and his friends would contribute their knowledge of magic. They would have to learn to work together, with Spider - Man having to adapt to the strange rules of the wizarding world, like not being able to use his phone or other Muggle technology in Hogwarts.
His web - slinging would work great for mobility. He could swing between buildings in the RWBY cities or even use it to quickly move around in the forest areas. His super strength would help him in combat against the Grimm, allowing him to punch them hard or hold them back.
In this fanfiction scenario, Spider - Man and Artemis being married would bring about a unique dynamic. Spider - Man is used to protecting New York City on his own, but with Artemis by his side, he'd have a partner with a different set of skills. Artemis, being a goddess in her own right, would introduce a whole new level of power and mystery. Their marriage could be a symbol of the combination of modern superheroism and ancient mythology. They might face challenges like Artemis adjusting to the modern world and Spider - Man getting used to having a partner who has such a strong connection to a different kind of power source.
One way could be that they discover they are siblings through some magical or mysterious event. Maybe there's a prophecy that involves the two of them. Then, they have to work together to fulfill it. Their powers would be key in this. Naruto's Rasengan and Glynda's ability to manipulate objects could be used to defeat the antagonists in the story.
Their powers could combine in a way that Naruto's chakra enhances Spider - Man 2099's physical abilities. For example, his strength and speed could be increased even more. Also, Spider - Man 2099 could use Naruto's shadow clone technique to create multiple copies of himself to confuse enemies while swinging around on his webs.