One common theme could be the relationship dynamics between the male characters in the 'madness combat' universe. It might explore how they support each other in the violent and chaotic world of 'madness combat'.
A great idea for a Madness Combat fanfic is to set it during a time before the main events. Show how the world of Madness Combat was before all the chaos and bloodshed. It could be a story about the early days of the Nexus City and how the different factions started to form. Or you could write a fanfic that focuses on a mission that goes completely wrong for the main characters. They have to face unexpected challenges and enemies, and they have to rely on each other in new and different ways to survive.
You could write a fanfiction where the Madness Combat world intersects with another fictional universe. For instance, if some of the characters from Madness Combat ended up in a post - apocalyptic world like Fallout. This would lead to new challenges as they have to deal with different threats and environments, and it would be exciting to see how they interact with the new characters in that world.
I'm not sure where to specifically find 'madness combat gay fanfic'. However, you could try looking on some popular fanfiction websites like Archive of Our Own. Just search for 'madness combat' and then filter the results for the relevant theme.
Begin by choosing a specific aspect of the Madness Combat world that interests you. It could be the unique weapons, the dark and gritty setting, or the complex relationships between characters. Do some research on fan theories and existing fanfictions to get inspiration. Then, create an outline. Outline the main plot points, like the beginning, middle, and end of your story. This will give you a roadmap to follow as you start writing your fanfiction.
A crossover with a cyberpunk universe would also be cool. Picture the Madness Combat guys in a neon - lit city filled with advanced technology and cybernetic enhancements. Maybe they have to battle against corporate - controlled mechs or hack into a powerful computer system.
Sanford and Deimos are also great choices. Their friendship and teamwork could be a contrast or complement to the relationships in the other world of the crossover. They could bring in their own unique skills, like Sanford's strength and Deimos' marksmanship.
To make your fanfic stand out, have a strong and original plot. Don't just rehash the same old battles and storylines from the official Madness Combat series. Maybe introduce a new mystery that the characters have to solve, like a strange virus that's affecting the combatants and making them act even more erratically. Another way is to develop complex and interesting relationships between the characters. Show their emotions, their rivalries, and their loyalties in a more nuanced way than the original.
In a yandere phobos x will fanfic, one aspect to consider is the power dynamic. If Phobos has more power, it can intensify his yandere tendencies. For example, he could use his influence to isolate Will. The fic might also focus on Will's reaction to Phobos' yandere behavior. Will could either be scared or, in an interesting twist, gradually come to understand and even accept Phobos in some way.
Look for fanfic communities dedicated to the source material that Phobos and Will are from. There, you can ask for recommendations of 'yandere phobos x will fanfic'. Members are usually quite helpful in sharing their favorite stories in this genre.