One idea could be exploring his past before he became the Man in Black. Maybe he had a family or a different life that led him down this dark path. Another plot could involve him having a change of heart due to an unexpected encounter, like meeting a child with pure innocence that makes him question his actions.
Perhaps a fanfiction could be written where the Man in Black is forced to team up with his enemies to face a greater threat. This would put him in a very uncomfortable position as he has to rely on those he usually despises. The story could explore his internal struggle as he tries to maintain his own motives while working with others, and how this experience might change him in the end.
A plot idea could be a story where the Man in Black tries to find a way to break free from the forces that control him. He might discover an ancient artifact that has the power to sever his connection to the darkness, but he has to face many challenges and enemies along the way. It could also involve his relationships with other characters from The Dark Tower universe, such as how he manipulates them to achieve his own goals.
One idea could be a crossover where the characters from RWBY enter the Dark Tower universe and have to face its unique challenges. Maybe Ruby could use her scythe skills to fight off the creatures that lurk around the Dark Tower.
Another plot idea might be an OC who is on a quest to find a long - lost relative who was taken by the Crimson King. This OC could team up with the main characters like Roland. Along the way, they face challenges like dealing with the various creatures in the wastelands and trying to decipher the riddles left by the Man in Black.
One idea could be that the black suit gives Peter Parker enhanced senses that are a bit too much to handle at first. He has to learn to control them while also dealing with school and his normal Spider - Man duties.
One interesting fanfiction could be about exploring the backstories of the characters more in - depth. For example, delving into the past of Roland before his journey in the movie. It might show his early training and the events that shaped him into the gunslinger we see in the film.
Well, perhaps they form a secret society within Hogwarts that promotes dark magic. They recruit students who feel left out or who have a thirst for more power. Dark Hermione could use her knowledge of spells and Dark Fleur her charm and allure to draw in followers. And then there could be a conflict when the other students and teachers start to suspect something and try to stop them.
One plot idea could be that Dark Naruto forms an alliance with Dark Kyuubi to take over the Hidden Leaf Village. They use their combined dark powers to manipulate the villagers and turn them against each other. Another idea is that they embark on a journey to find a powerful, ancient artifact that can enhance their dark abilities even further. Maybe they face off against the original Naruto and Kyuubi in a final battle of good versus evil.
A plot where they are stranded on a strange planet during a space mission. They must work together to survive, build shelter, find food, and also figure out a way to communicate with Earth. This would test their relationship and survival skills in a new environment.
A plot could involve Iron Man getting lost in Wakanda. Black Panther finds him and they have to work together to get Iron Man back to his world. During this time, Iron Man discovers new things about Wakanda's technology and culture. He then helps Black Panther upgrade some of Wakanda's defenses in return for the help. This could also lead to some cultural exchanges between the two characters and their respective worlds.
Well, there could be a story where a powerful criminal organization is stealing high - tech equipment from both Wakanda and Stark Industries. Spider - Man, being the friendly neighborhood hero, and Black Panther, the king of Wakanda, cross paths while trying to stop this organization. They initially have some misunderstandings due to their different ways of operating, but then they learn to work together. This could involve lots of action scenes in both the urban jungle of New York and the beautiful landscapes of Wakanda, as well as some great character development as they get to know each other's strengths and weaknesses.
One idea could be that Black Widow and Spider - Man are forced to team up on a mission in a foreign city. They have to deal with a new villain who has the power to manipulate technology and is causing chaos. Spider - Man uses his agility and web - slinging skills while Black Widow uses her combat expertise and espionage knowledge to track down the villain.