It could be about Spider - Man and Speed Racer teaming up to stop a villain who is using high - speed vehicles to commit crimes in the city. Maybe the villain has some sort of device that can make the vehicles invisible, and Spider - Man's web - slinging skills combined with Speed Racer's driving expertise are needed to catch him.
A likely antagonist could be a tech - savvy criminal. This person could be stealing parts from Speed Racer's cars to create some sort of super - vehicle that can outrun Spider - Man. They might also use the stolen technology to disrupt the city's infrastructure, causing chaos that both heroes need to stop.
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.
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.