I'm not sure who the absolute best is, but there are some well - known names in the fanfiction community. Some authors who have a good reputation for writing about superheroes in general might also write great Spider - Man and Lizard stories. You can check out fanfiction platforms and look for those with high ratings and lots of reviews for their Spider - Man and Lizard works.
One plot idea could be that the Lizard is actually being controlled by an evil scientist who wants to use him to take over the city. Spider - Man has to figure out how to break the control and save his enemy. Another could be a story where the Lizard has a moment of self - awareness and teams up with Spider - Man to stop a greater threat. For example, a group of aliens that are attacking the city and both of them realize they need to work together.
Perhaps the Lizard's story in Spider - Man 5 will explore his origin more deeply. It could show how he became the Lizard in the first place and what his true motives are beyond just causing chaos. Also, Spider - Man might have to develop new strategies to defeat him as the Lizard could be smarter and stronger than before.
Spider - Man in Marvel vs Capcom fanfiction also represents the idea of a street - level hero in a world full of powerful and sometimes god - like beings. His down - to - earth nature, despite his superpowers, makes him relatable. Fanfiction writers often use this aspect to create interesting story arcs, like Spider - Man having to prove himself among the more 'cosmic' characters in the Marvel vs Capcom roster.
In some fanfictions, they might team up against a common enemy that requires both their unique skills. For example, a new super - villain who has the ability to hack into Iron Man's technology and also has super - strength that Spider - Man has to counter with his acrobatic fighting style. They would have to learn to work together, with Iron Man respecting Spider - Man's instincts and Spider - Man learning to trust Iron Man's strategic plans.
In some fanfictions, the winner isn't really about who is more powerful physically or technologically. It could be about who has the stronger will or the better moral compass. For example, if Iron Man realizes that he's in the wrong during the fight, he might back down, making Spider - Man the 'winner' in a sense. Or if Spider - Man is able to convince Iron Man of a greater good, the fight could end without a clear physical victor.
One key element is the power dynamic. Spider - Man's powers are well - known, but Morlun's are more mysterious and often overpowering in a different way. Another element is the setting. Fanfiction writers might choose different locations for their battles, which can add new challenges and opportunities for both characters. Also, the character development of Spider - Man as he faces this seemingly unbeatable foe is crucial.