A new and powerful mutant who believes that only the strong should lead mutants could be the main antagonist. This mutant could be jealous of Cable and Deadpool's influence and start a civil war by spreading rumors and creating division between their followers. He or she could also have some sort of unique power that makes them a formidable foe in battle.
Mr. Sinister could be a great antagonist. He's always interested in mutant genetics and power. He could be the one secretly pulling the strings, making Cable and Deadpool believe they need to fight over the future of mutantkind. He could plant false evidence or use his mind - control abilities on some of the supporting characters to fuel the conflict.
A 'civil war cablepool fanfic' is likely a work of fan fiction that takes place during a civil war and features the characters Cable and Pool. Fanfic authors often take existing characters and place them in new and interesting situations. In this case, the civil war setting could provide a backdrop for all sorts of plotlines. It might explore themes like loyalty, friendship, or the struggle for power through the eyes of Cable and Pool. There could be battles, political intrigue, and personal growth for the characters as they navigate this war - torn world.
It could be a power - hungry politician who wants to use the Hulk as a weapon to gain more control during the Civil War. This person might not care about the destruction the Hulk could cause, just as long as they achieve their own goals.
It could be Mysterio. He's known for his illusions and deception. In the context of a civil war, he could use his powers to create false scenarios that make the heroes fight each other even more. He might pretend to be a hero on one side, but secretly be working to make the conflict worse for his own gain.
To be honest, it's difficult to say if there are popular 'civil war cablepool fanfic' stories. The popularity of fanfic can be very subjective and depends on various factors such as the size of the fan community interested in these characters, the promotion of the fanfic within relevant circles, and the overall quality of the writing. It could be that there are some great stories out there that just haven't reached a wider audience yet, or it could be that this is a relatively new or under - explored concept in fanfic and there aren't many stories to begin with.
One idea could be that Cable and Deadpool find themselves on opposite sides due to a misunderstanding about a new mutant - registration law. Cable believes in strict control to protect mutants in the long run, while Deadpool just wants chaos and freedom. Maybe Deadpool starts a prank war against Cable's side that accidentally escalates the situation.
A new supervillain could emerge. Maybe a scientist who got access to some of the leftover technology from the Civil War battles and uses it to create a powerful weapon. He then targets Spiderman because he represents the superhero community.
It could be a Miraculous holder who has been corrupted by the power. They might start to think that they should be the sole leader and use the civil war as a means to take over. For example, if a holder of a powerful Miraculous like the Bee Miraculous turns bad, they could be a formidable antagonist.
Green Goblin is another option. He might take advantage of the divided superhero community. He could target Spider - Man specifically, knowing that with the other heroes at odds, there's less chance of them coming to his aid. He could also try to use the conflict to his advantage in his criminal activities, like stealing from places that are unguarded because the heroes are busy fighting each other.
Loki could be a great main villain. He could be secretly fueling the Civil War for his own gain, like trying to take over Asgard while everyone is distracted. He has the cunning and the motivation to do so.
The Kingpin could be a great main villain. He could see the Civil War as an opportunity to expand his criminal empire. He could be secretly funding both sides in a way that makes the conflict worse, all while Spider - Man is trying to figure out his role in the war.