One interesting plotline could be the initial encounter between the Marauders and the Evans family. Maybe there's a bit of confusion or misunderstanding at first, like the Marauders' rowdy behavior clashing with the more subdued Evans household. Another could be the development of friendships or alliances. For example, a Marauder might form a special bond with one of the Evans siblings over a shared interest in magic or a particular Hogwarts subject.
Obviously, the Marauders which include James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew. And then there are the Evans family members. Most likely Lily Evans, who is quite important as she has her own story arc and connection to the Marauders, especially James. There might also be other Evans siblings or family members depending on how the fanfiction is written.
A great plotline is when fanfiction delves into how Snape's relationship with Lily affects his interactions with the Marauders. Since he loves Lily and she is friends with the Marauders, it creates a complex dynamic. In some fics, Snape might try to protect Lily from the potential harm that could come from the Marauders' more dangerous pranks.
Perhaps a plotline where Hermione has to solve a mystery that the Marauders were involved in. The Marauders might have left behind some clues that only Hermione, with her sharp intellect and research skills, can decipher. This could bring her closer to understanding their true nature and the secrets of their time at Hogwarts.
There are fanfictions where they meet in a dangerous situation. For example, in a Forbidden Forest encounter. The Marauders are exploring, and Regulus has gotten lost. They initially suspect each other of ill intentions but then realize they need to work together to get out. And there's also the type where they meet at a pure - blood event, which challenges their different beliefs about blood purity and friendship.
One great 'marauders meet harry fanfiction' is 'The Marauders' Era Rewritten'. In this story, Harry is sent back in time and gets to interact with the Marauders in a really unique way. It shows how their personalities clash and mesh with Harry's.
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.
Another plotline could involve Petunia getting involved in one of the Marauders' adventures by accident. Maybe she stumbles upon them while they are exploring a secret part of Hogwarts and has to work with them to get out of a tricky situation.
One interesting plotline could be exploring Snape's early interactions with the Marauders. Maybe it shows how his enmity with them truly began. For example, it could focus on a particular incident in their school days that was a turning point.
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.
Perhaps a plotline where Ginny accidentally travels back in time and actually meets the Marauders. This would lead to a whole series of adventures as she tries to fit in with their group, while also trying not to change the future too much. She might have to help them with some of their pranks against Snape without making things worse between them.