One idea could be exploring the Marauders' time at Hogwarts in more detail. For example, showing how they formed their friendship and the pranks they played on Snape that weren't in the original books. Another plot could be a time - travel fanfiction where a character from the future goes back to the Marauders' era and tries to change certain events. Or perhaps a fanfiction where the Marauders have to deal with a new dark threat at Hogwarts that no one else is aware of.
A great plot for Marauders story fanfiction could involve the Marauders' secret Animagus training. You could write about their difficulties in learning the transformation, the mistakes they made along the way, and how they finally mastered it. Also, a story about the Marauders' love lives would be interesting. Maybe James' pursuit of Lily and how the other Marauders supported or teased him about it. Another aspect could be exploring Remus' struggle with his werewolf identity and how his friends helped him keep it a secret from the rest of the school.
A possible plot for Marauders Afterlife fanfiction is that they are in a sort of limbo where they can observe the lives of their loved ones. James could watch over Harry and try to influence him in small ways. Remus might find a way to comfort Tonks from the afterlife. And they could all be working towards a way to return to the living world for a short time to give important messages or help in a great battle that's about to happen in the wizarding world.
Another plot could involve the Marauders getting involved in a mystery that is plaguing Hogwarts in the present day. They use their old - school pranking skills and knowledge of the castle's secrets to solve it. They might have to team up with some of the current Gryffindor students who remind them of themselves when they were young.
Well, you could have an OC who is a half - blood trying to keep their identity a secret. The Marauders could accidentally discover it and help the OC deal with the potential consequences. Or an OC who is a seer and has visions about the future of the wizarding world during that time, which could include the rise of Voldemort. The OC could then try to enlist the help of the Marauders to prevent it. Also, an OC with a time - traveling device that malfunctions and lands them in the Marauders era, and they have to find a way to get back while interacting with the Marauders and other characters.
Well, one idea could be exploring the marauders' earlier days at Hogwarts in more detail. Maybe showing how they formed their tight-knit group and came up with their mischievous plans.
One idea could be that the Marauders travel back in time and accidentally change something that affects Lily's future. Maybe they prevent her from meeting James, which then sets off a chain of events to fix the timeline.
Another plot could revolve around the love interests of the Marauders. For instance, James Potter's pursuit of Lily Evans. You could show their early interactions, the misunderstandings, and how their relationship gradually developed. It could also include how his friends supported or sometimes complicated his efforts to win her over.
A great plot idea could be Harry getting involved in the Marauders' pranks but also using his experiences to guide them towards more responsible magic use. He could also be a key figure in uniting different groups in the wizarding world during that time. Since he has a different perspective, he might be able to bridge the gap between pure - bloods, half - bloods, and Muggle - borns much earlier, which could have a huge impact on the future and the fight against Voldemort.
One idea could be the new marauders getting into trouble with a new set of magical artifacts that have been hidden in Hogwarts for centuries. They might discover a map that leads to these artifacts, much like the Marauder's Map. Another could be their interactions with the ghosts in Hogwarts in a more adventurous way, like trying to solve a mystery that the ghosts have been keeping for ages.
One idea could be a what - if scenario where Naruto becomes a rogue ninja. This would completely change the dynamics of the story and his relationships. For example, he might be hunted by his former friends, and we could explore his inner struggle and reasons for turning rogue.
A really interesting fanfiction plot could be about a group of scientists who were working on a project to reverse - engineer the demon technology. They think they can use it to create a weapon against the demons. However, things go wrong and they accidentally open a new portal to a different demon dimension, which brings in even more powerful and unknown demons. The story could then focus on how they deal with this new threat and try to close the portal.