A possible fanfiction could involve Naruto being a wildcard in the Civil War. He doesn't really understand the full politics of the situation at first. But as he learns about the registration act, he decides to oppose it. He teams up with some of the anti - registration superheroes and uses his unique abilities like chakra control and rasengan to fight against those who want to enforce the act.
The Naruto civil war in the Marvel fanfiction would likely introduce new power sets and abilities. The Marvel heroes and villains would be exposed to things like chakra manipulation and unique jutsu. This could inspire some of them to develop new ways to fight or gain power. For instance, Loki might try to use the power of the tailed beasts for his own nefarious purposes. It would also create a new source of conflict as different characters in the Marvel world would have different opinions on how to deal with the Naruto civil war.
One possibility is that the shinobi skills from Naruto could be pitted against the superpowers in the Marvel world. For example, Naruto's clones might be used to confuse and outmaneuver the likes of Spider - Man. Or perhaps the Sharingan could be used to predict the moves of characters like Captain America. It would be a chaotic and exciting crossover.
Naruto's shadow clone jutsu could tip the balance. If he sides with one of the factions, he can create a large number of clones to overwhelm the opponents. For instance, if he's with Captain America's side, the clones can be used for reconnaissance and in battles, making it harder for Iron Man's side to predict their moves.
In Marvel Civil War main story, it's basically a big rift among the superhero community. Iron Man's side thinks registration is necessary as superhero actions can cause a lot of destruction. Captain America, on the other hand, feels that the government might misuse the registered superheroes. There are battles between the two factions, friendships are broken, and it's a huge chaotic situation that shakes the Marvel universe.
In the Marvel Civil War comics, there's no straightforward single winner. Both sides have their moments and losses, and it's more about the complex consequences and changes it brings to the Marvel universe.
Basically, the Marvel Civil War story focuses on the conflict between superheroes regarding the issue of government control and accountability. It brings out deep moral and ethical questions and showcases intense battles and character developments.