The story could be about how Revan trains Harry to be a more strategic thinker. Harry, who has often been reactive in his battles against Voldemort, could learn from Revan's military tactics. Revan might teach him how to plan battles, how to analyze his enemies' weaknesses, and how to use his allies more effectively. This would make Harry a much more formidable opponent in the fight against the Dark Lord.
It could still be Voldemort. Even with Revan's training, Voldemort's power and his army of Death Eaters would pose a significant threat. Harry would have to use his newly acquired skills from Revan to finally defeat Voldemort once and for all.
One possibility could be that Kreia imparts her unique and rather cynical view of the Force (from the Star Wars universe) onto Harry. This might make Harry question the black - and - white nature of magic in his world. For example, Kreia could train Harry to look beyond the simple spells and charms and understand the deeper implications and power sources of magic, much like she did with the Exile in Star Wars: Knights of the Old Republic II.
In this fanfic, perhaps Harry would learn Oogway's wisdom. Oogway is very calm and perceptive in Kung Fu Panda. Harry could gain a new perspective on his battles against Voldemort. He might learn to be more patient and strategic, not just relying on his magic skills but also on inner strength and observation skills like Oogway.
Well, it could be that Dr Strange uses his magic knowledge to train Harry Potter in different ways of spellcasting. Maybe he shows Harry how to manipulate time and space while casting spells, which could give Harry an edge in fighting Voldemort. He might also teach Harry about different magical dimensions and how to draw power from them.
In such a fanfiction, the plot might start with Harry being transported to the Avengers' world. They recognize his potential and decide to train him. Harry would be exposed to new ways of thinking. The Avengers' training methods would be different from what he's used to at Hogwarts. He might struggle at first to adapt, but gradually he would learn. For instance, Black Widow could train him in espionage and stealth, which could be useful when dealing with dark wizards in a more covert way.
Well, it could involve Anakin learning unique combat styles from Revan. Maybe Revan imparts his knowledge of the Force, which is different from the traditional Jedi teachings Anakin has received. This could lead Anakin to question some of the Jedi Council's ways.
One possible plot could be that Harry discovers he has a connection to Darth Revan through some ancient magic or a prophecy. He then starts to develop powers similar to the Force, like telekinesis but in a magical way. He might use these new abilities to fight Voldemort and his Death Eaters, taking them by surprise as they've never seen such powers before.
Well, it could be that Baba Yaga takes Harry under her wing in the Forbidden Forest. She might teach him some really old and dark magic that Dumbledore wouldn't approve of. Harry could use this new knowledge to fight Voldemort in a different way, perhaps with more primal and earth - based spells.
In such a fanfic, perhaps Harry would learn ancient and powerful magic. Merlin could teach him spells long forgotten in the wizarding world of Harry's time. Harry might gain an even deeper understanding of magic and its origins, becoming an even more formidable wizard.
In such a fanfiction scenario, Harry Potter might gain some rather unique skills. Loki is known for his cunning and magic in the Norse mythology and Marvel universe. He could teach Harry more devious forms of magic, different ways to deceive opponents. Maybe Harry would learn to be more adaptable in his use of magic, not just relying on the traditional spells he learned at Hogwarts.