Definitely Wolverine. His healing factor and berserker rage would make for an interesting dynamic against the symbiotes in 'Web of Shadows'. Another great character is Captain America. His leadership and moral compass could guide Spider - Man in a situation where the symbiote - influenced chaos is causing moral dilemmas. And Daredevil could also be a good addition. His enhanced senses could help detect the symbiotes in ways Spider - Man might not be able to.
One idea could be a crossover with the X - Men. Spider - Man could find himself in a situation where he has to team up with the mutants to fight a common enemy that is using the symbiote technology from 'Web of Shadows' against both groups. Another plot could involve a crossover with the Fantastic Four. Maybe the symbiote invasion in Spider - Man's world starts affecting the Negative Zone, and they have to work together to stop it from spreading further.
A fanfiction could focus on Black Cat's backstory within the Web of Shadows context. Maybe she has a secret past connection to the symbiotes that is slowly revealed as she battles against them. This would add depth to her character and her role in the story.
In the context of Spider - Man: Web of Shadows' evil ending fanfiction, one interesting aspect could be the character development. If Spider - Man goes down the evil path, how do the other characters react? For example, Mary Jane might be horrified and try to bring him back to the good side. Also, villains might either team up with this new, evil Spider - Man or see him as a threat to their own plans.
One idea could be exploring what would happen if Spider - Man had to team up with his villains to fight a greater threat from another dimension. For example, Venom and Green Goblin might be forced to work with him.
In the 'Spider - Man Web of Shadows' story, Spider - Man is at the center. His love interest Mary Jane plays a significant role. Other characters include his fellow superheroes. For instance, Luke Cage, who has his own unique abilities and can be a powerful ally or an adversary depending on the situation. Wolverine also makes an appearance. His healing factor and his ferocious fighting style add an interesting dynamic to the story. There are also the villains who are either behind the symbiote invasion or are part of the chaos it causes.
The 'Spider - Man Web of Shadows' story is about Spider - Man facing a symbiote invasion in New York City. The city is overrun by symbiotes, and Spider - Man has to decide how to deal with this crisis. He has to fight his friends who are taken over by the symbiotes and also figure out a way to stop the spread of the symbiotes.
A new character that could be interesting is a scientist who was working on a project to reverse the effects of the symbiote. This character could have a complex backstory, like they were once a student of Dr. Connors and turned to this research after seeing the chaos the symbiote brought.
A plot could be that Black Cat gets infected by a different kind of symbiote that gives her new powers. She has to learn to control these powers while also dealing with the fact that Spider - Man is a bit suspicious of her new abilities.