Well, in some 'Harry goes to Marauders time' fanfictions, a great plotline is Harry trying to prevent certain tragedies. He might attempt to stop the betrayal of one of the Marauders, knowing how it will all end in his own time. Also, his relationship with Lily and James could be a major part of the story. He could be the one to give them some advice that changes their fate, like how to better protect themselves from Voldemort.
A common and exciting plotline in such fanfiction is Harry's struggle to fit in the Marauders' time while still being true to himself. He has to adapt to the different culture and magic of that era. At the same time, he may find himself in the middle of the Marauders' pranks and adventures. This can lead to some really fun and unexpected situations, like when he accidentally messes up one of their elaborate pranks or adds his own modern - day twist to it.
A great plotline in such fanfics is when Harry has to deal with the time - travel paradoxes. Since he's in the Marauders era, any change he makes could have a huge impact on his own future. He might be hesitant to do too much at first. Also, his relationships with the Marauders are fascinating. He could become like a mentor figure to them in some ways, teaching them things he learned from Dumbledore. And the whole idea of him being in a world where Voldemort is still rising but in a different stage is full of potential for exciting story development.
One interesting plotline could be how Harry's personality is shaped differently. With the Marauders' influence, he might be more mischievous and confident. For example, he could learn pranks from them at a very young age and use them to outwit his enemies later on.
Well, in some fanfictions, there are plotlines about the Marauders getting involved in some sort of mystery at Hogwarts that is deeper than the normal school drama. For example, they might uncover a dark secret about one of the teachers or a hidden part of the castle. This could lead to them having to use their combined skills and friendship to solve the problem and keep the school safe.
Well, a cool plotline might involve the main character introducing modern ideas to the Marauders' time. Maybe they bring new spells or ways of thinking that completely change the dynamic at Hogwarts. It could be really exciting to see how the Marauders and their friends react to these new concepts.
Well, in some 'Harry Potter goes back in time' fanfics, Harry might go back to his first year at Hogwarts. He could then use his more advanced magical skills (from his future experiences) to solve the mystery of the Philosopher's Stone in a completely different way. This might involve him befriending different people earlier or even changing the course of how the challenges in the dungeon were set up.
One interesting plotline could be Harry trying to prevent the death of his parents. He might use his knowledge from the future to change certain events. For example, he could try to stop Voldemort's rise to power earlier in the Marauders' time.
One interesting plotline could be the identity of the masked marauders. Are they related to the original Marauders? Maybe they are descendants with a new mission. Another could be their interactions with Harry and his friends. Do they help or hinder Harry in his fight against Voldemort? It could also be about the secrets they hold that are related to Hogwarts' past, which could be a major factor in the story.
Maybe Harry finds himself in a situation where he has to team up with the Marauders to fight a common enemy that was previously unknown in the original Potter story. This would create a whole new dynamic and show how different generations of Hogwarts students can work together.
One interesting plotline could be Harry using his modern magic knowledge in Camelot. For example, he might introduce some simple spells that could be useful for daily life in Camelot like a spell for lighting fires easily. Another could be his interactions with the knights of the Round Table. He might learn their code of chivalry and in turn teach them about loyalty in a different way from his own experiences at Hogwarts.
One interesting plotline could be that Harry's 'going crazy' is due to a powerful dark magic spell that was secretly cast on him. He starts seeing strange visions and having out - of - control magic surges.