What are some interesting plotlines in Harry Potter meets Grindelwald fanfiction?

One interesting plotline could be Harry somehow traveling back in time to meet Grindelwald in his prime. This could lead to a battle of wits between them, with Harry trying to stop Grindelwald from starting some of his more heinous plans early. Another might be that Grindelwald, seeing Harry's power, tries to recruit him to his side, offering him power and knowledge that Harry has to resist.

One possible plotline could be Harry's internal struggle with his heritage. Since Grindelwald was a dark wizard, Harry might battle with the idea of having such a connection. He could face prejudice from the wizarding world while also trying to understand if there are any redeeming qualities in Grindelwald's ideology that might be passed on to him.

Plots that involve Grindelwald's unorthodox magical experiments are really captivating. In 'Grindelwald's Forbidden Magic', the fanfic shows how his experiments could have changed the wizarding world if they had been fully realized. It's full of mystery and danger.

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 fanfiction could be about Grindelwald's early years before he became so dark. It might explore his relationships at Hogwarts and how his views gradually changed. Another could be a story where Grindelwald teams up with a young Harry Potter in an alternate universe to fight a greater evil. There's also fanfiction that focuses on Grindelwald's relationship with Dumbledore and how it affects the wizarding world in different ways.

There are fanfictions that explore the idea of Harry Potter being sent back in time and having to deal with Grindelwald during his reign of terror. This allows for a lot of interesting plot twists as Harry tries to use his modern - day knowledge to stop Grindelwald without changing the future too much.

Perhaps a plotline where the Marauders' spirits or echoes are awakened in Harry's time at Hogwarts. They start guiding him in his fight against Voldemort. They teach him spells and strategies that they used during their own battles against the Dark Arts. This would give Harry an edge and also create some really heartwarming and funny interactions as he tries to keep their presence a secret from his friends.

One common plotline might be Harry's discovery of his true paternity. He could struggle with the idea of being related to Grindelwald, a dark wizard. Another could be the reaction of his friends, like Hermione and Ron, who might be shocked and confused.

One interesting plotline could be exploring their early days at Hogwarts together. Maybe they were both brilliant students with different outlooks that gradually diverged. Another could be a story where they meet again after Dumbledore defeats Grindelwald, and there are still unresolved feelings and thoughts between them. A third one might be a fanfiction that delves into an alternate universe where they actually work together to achieve some 'greater good' that they both misinterpreted in different ways.

There are fanfictions where Grindelwald, in an alternate universe, teams up with Harry Potter to fight a greater evil. This flips the typical view of them being on opposing sides. In such a story, they could combine their different forms of magic and knowledge to overcome a threat that neither could face alone.