Perhaps in this fanfiction, Harry gets a second chance at his Hogwarts years. He might choose to befriend different people or focus more on certain subjects. For example, he could have a stronger focus on learning about ancient magic which could help him in future battles. This new knowledge could also change his relationships with the teachers and students at Hogwarts.
Well, it could be about Harry getting a chance to redo a crucial event in the wizarding world. Maybe he has the opportunity to save someone he previously lost, like Sirius Black. He could use his knowledge from the first time around to outwit Voldemort in a different way, leading to a more peaceful resolution in the wizarding world.
Well, perhaps in this fanfiction, Snape gets a second chance to change his relationship with Harry. Instead of being so cold and harsh, he could mentor Harry properly from the start. He might reveal his true intentions and past to Harry, and together they could fight against Voldemort in a more united front, with Snape using his knowledge and skills in a more positive way.
It could still be Voldemort. Even though Harry has a second chance, Voldemort is still a major threat in the wizarding world. His presence and his Death Eaters would continue to be the main source of danger, and Harry would need to use his second chance wisely to defeat him once and for all.
One possible plotline could be Naruto using his second chance to prevent some of the tragedies that occurred in the original story. For example, he might be able to save Jiraiya from his death at the hands of Pain. Another could be that he focuses on training much earlier and more intensively, thus achieving even greater power levels faster. He could also use this second chance to better understand and connect with Sasuke from the start, potentially preventing Sasuke's defection.
In the 'Percy Jackson Gets a Second Chance' fanfiction, he could form stronger alliances. Maybe he'd reach out to some characters he didn't fully trust before. He could also use this second chance to get closer to his family, like his mom, and protect her better from the threats of the mythological world. He might even be able to prevent some of the major disasters that happened in the original story.
There's a possibility that he'll face new challenges. It could be a place full of dark magic or dangerous creatures. Harry would have to use his wits and skills to overcome these challenges, and this could be a great opportunity for him to grow as a wizard.
Well, it could be about a trainer who has failed in their previous Pokemon journey, maybe they lost a big tournament or had their Pokemon severely injured. But then they get a second chance. They might discover a new region with rare Pokemon species and use this opportunity to train differently, focusing more on the bond with their Pokemon rather than just winning.
Well, it could be about a character who died in the original series getting a second chance at life. For example, Ned Stark could come back and use his knowledge of the events that happened before to change the course of the war for the Iron Throne. He might form new alliances and prevent some of the tragedies that occurred.
In the 'harry gets a tattoo fanfiction', he might get a tattoo as part of a bet or a dare. His friends challenge him and, being the brave Harry we know, he accepts. The tattoo could be something really out - of - the - ordinary, like a moving image of his Patronus. This could lead to all sorts of adventures as he tries to hide it from the more conservative members of the wizarding world.
In this fanfiction, perhaps Harry saves a girl from a dangerous magical creature during one of his adventures outside of Hogwarts. She's so grateful and as they spend more time together healing her wounds and such, they develop feelings for each other.
Well, perhaps Voldemort's followers could kidnap Harry to use him as a bargaining chip. They might hold him in an old, dark wizarding house, guarded by dark magic. Harry would then try to escape using his own magic skills and the help of some unexpected allies like house - elves who secretly oppose Voldemort.