Perhaps Warren is a scientist in this fanfiction and he creates a new technology that both Spider - Man and his enemies are interested in. This could lead to a complex story where Spider - Man has to protect Warren from the bad guys while also trying to understand the technology himself. It could involve a lot of action scenes as Spider - Man swings through the city to keep Warren safe.
Another plot could be that Warren has some sort of special power or ability that he doesn't fully understand. Spider - Man helps him to discover and control this power. Along the way, they face challenges from villains who want to use Warren's power for their own evil purposes. This could lead to a story of friendship and self - discovery between the two characters.
You could also check out some of the blogs or personal websites of known Spider - Man fanfiction writers. They might have written or be aware of 'Spectacular Spider - Man Warren Fanfiction' and provide a link on their site.
The plot could involve the Sinister Six stealing a powerful device. Spider - Man has to track them down to get it back. Along the way, he discovers that the device is part of a larger plan to take over the city. He has to face off against each member's unique abilities as he tries to stop them.
One idea could be exploring the relationship between Spider - Man 2099 and other superheroes in the future. Maybe he teams up with a new group of heroes to fight a powerful villain who threatens the entire city.
One plot idea could be Spider - Man taking a break at the beach and suddenly having to face a new villain who emerges from the ocean depths. Maybe it's a mutated sea creature caused by some underwater experiment gone wrong. Another could be that Peter Parker is at the beach with his friends and he has to balance his normal life and secret identity when a small - scale crime occurs right there on the beach. He has to find a way to stop it without revealing his powers to his friends.
Well, perhaps there's a plot where a powerful alien entity arrives on Earth. Gohan, who is visiting from his own universe, senses the danger. Spider - Man also notices the strange happenings. They cross paths and decide to work together. Gohan uses his super strength and energy blasts while Spider - Man uses his webs and street - smarts. Along the way, they learn about each other's worlds and grow as friends. As they face the alien, they combine their powers in unique ways, like Gohan creating an energy web with Spider - Man's help to trap the alien. And in the end, they successfully send the alien back to where it came from and Gohan returns to his own universe, but not before promising to visit again.
One idea could be Carnage taking over a major corporation in the Spectacular Spider - Man universe. Spider - Man then has to figure out how to stop Carnage without causing too much destruction to the company and its employees. Another plot could involve Carnage teaming up with a lesser villain to create chaos, and Spider - Man has to face two foes at once.
One great fanfiction idea could be that Gwen discovers Peter's secret identity in a really unexpected way. Maybe she stumbles upon his Spider - Man suit while looking for something in his room. This would create a lot of drama and tension between them as she has to decide what to do with this knowledge.
The Vulture could be a likely villain. He might see kidnapping a Spider - Man fan as a way to draw Spider - Man out into the open and then attack him when he's vulnerable trying to rescue the fan. The Vulture could be after some valuable tech that he believes Spider - Man has hidden and thinks the fan might know its location.
Another plot could involve the black suit affecting Peter's relationships. Maybe his friends start to notice the change in him, and he has to deal with their concerns. Mary Jane might be worried about the new, edgier Peter. Also, the suit could cause problems with his identity as Spider - Man. What if it starts to take over during his daily life and he has to struggle to keep it in check? This could lead to some really interesting internal and external conflicts.
A plot idea could involve the symbiote suit being able to communicate with other symbiotes from outer space. It could be luring them to Earth, thinking they can all live in harmony, but they actually want to take over the planet. Spider - Man has to figure out a way to stop this while also dealing with the fact that the suit is becoming more and more unruly as it gets closer to its 'friends'.