A great fanfiction idea could be that James Potter time - travels during a crucial battle in the wizarding world. He travels back to a time when the dark forces were just starting to rise. With his future knowledge, he could start preparing the wizarding community earlier. He could train young wizards and witches in advanced defensive magic, and try to change the course of history so that the big battle he left behind would have a different, more positive outcome.
One great James and Lily Potter time travel fanfiction is 'Back to the Beginning'. It shows their journey back in time and how they interact with their past selves. It has a great plot with lots of emotional moments.
One common theme is family. Since James is traveling through time, he often gets to meet his ancestors or relatives from different eras. This gives the author a chance to explore family relationships and how they shape the Potter family.
A plot could be that James Potter travels back to the time when Voldemort was still Tom Riddle at Hogwarts. He could try to influence Riddle in a positive way, perhaps by befriending him and showing him a different path than the dark one. However, he has to be careful not to change the future too much or risk endangering his own existence and that of his family.
One great fanfic in this genre is 'Back to the Start'. It has an interesting plot where Harry goes back in time and meets his father, James. The interactions between them are really well - written, showing a different side of James Potter.
The theme of self - discovery is also prominent. As Harry spends time with James in the past, he learns more about himself. For example, he might realize that he has some of his father's traits that he didn't recognize before. And then there's the theme of friendship. Harry might see how James interacted with his friends and learn from that, or even form new friendships in the past.
One common theme is the idea of changing the past. Since they are time traveling, there's often a temptation or need to change certain events. For example, in some stories, Albus might want to prevent some tragedy from happening to James and Lily. Another theme is self - discovery. By seeing their family members in a different time, they learn more about themselves and their family history.
Some fanfics have the plot where James and Lily travel back to their school days. It's interesting to see how they handle seeing their younger selves and friends. They can also try to prevent certain events that led to bad things in the future. For example, they might try to stop a particular argument between friends that later had far - reaching consequences. It's full of character growth and self - discovery.
Another one is 'The Time - Traveling James Potter: A New Destiny'. Here, James travels back in time due to a powerful spell gone wrong. But instead of just reliving his past, he discovers that he has the ability to change the fates of some of the minor characters in the wizarding world. It's a different take on the time - travel concept and makes for an interesting story.
One great James Sirius Potter time travel fanfiction is 'Back in Time with James'. It has an interesting plot where James travels back to the Marauders' era and tries to fix some family issues. The author does a great job of portraying the different eras and how James adapts to the past.