Maybe Harry, feeling a bit out of place in his own wizarding world, stumbles upon some Avengers comics or movies. He becomes so enamored with their heroics that he starts training in his own way to be like them, using his magic to mimic their superpowers. He might even try to find a way to meet them in person and offer his magical skills to the team.
Well, perhaps Harry discovers the Avengers through some magical means like a spell gone wrong that transports him to the MCU world. He could be in awe of their powers and decide to learn from them, and then try to incorporate their fighting styles into his own magical battles.
Well, it could be that Peter starts off as a regular guy who is just a huge fan of the Avengers. Maybe he follows all their news, collects their merchandise. One day, he gets a chance to meet them somehow, like through a Stark Industries internship. Then he gradually proves himself useful to them and they start to train him. Eventually, he becomes part of the team, with his own unique skills like his spider - powers adding to the Avengers' strength.
It could be that Harry discovers he has some sort of connection to the Infinity Stones. So, the Avengers seek his help to understand and control the power of the Stones. Along the way, he has to deal with his own past traumas as well as the new threats in the Marvel world. He might teach the Avengers some magic too, like how to apparate short distances for quick escapes or attacks.
Maybe Thanos somehow discovers the wizarding world and decides he wants to add the power of magic to his collection of Infinity Stones. He could be the main villain, and Harry, with his understanding of both magic and his new Avengers - like abilities, would have to lead the fight against Thanos to protect both worlds.
In this fanfic, Percy might be seen as an outcast at first among the Avengers because he's so different. But as time goes on, they come to respect his abilities. The story could also explore how Percy's presence affects the dynamics within the Avengers. Does he create new rivalries or alliances? And how does he adapt to their high - tech world when he's used to the more ancient and magical world of the Greek gods? Maybe he even tries to introduce some of his own magic into their technology, leading to some interesting and unexpected results.
The plot could involve Harry Potter being transported to the Avengers' universe. He might use his magic to help the Avengers fight against a common enemy, like Thanos. For example, his invisibility cloak could be used for stealth missions, and his spells could be a new form of defense against alien threats.
Well, he could bring his unique water - controlling abilities to the Avengers. Maybe he'd be the one to put out the fires during big battles in the city. He might also form an interesting friendship with Thor, since they both have some connection to powerful elements.
She might bring her unique skills. For example, her hacking abilities could be very useful for the Avengers in gathering intelligence. Maybe she would also form a special bond with some of the existing Avengers, like Natasha Romanoff. They could train together and share their combat experiences.
One possible plot could be that Spider - Man initially gets scouted by SHIELD. They see his potential and start to train him secretly. As he gets better, he is introduced to the Avengers. There's some initial friction as the older members are a bit skeptical of his age and inexperience. But then, they all face a big enemy together, like an alien invasion. Spider - Man proves himself by coming up with a unique plan to defeat the enemy using his web - slinging skills and quick thinking.
In this fanfiction, Harry's Animagus skills as an Avenger might also lead to some interesting character interactions. He could teach the other Avengers about magic and how his Animagus form works. For instance, Tony Stark might be intrigued by the magic behind it and try to find a scientific explanation or a way to replicate it. Meanwhile, Steve Rogers could be more interested in how Harry uses this ability in combat situations.
Well, he'd probably bring his magic skills to the Avengers. He could use spells like Expelliarmus to disarm villains quickly. His broomstick flying skills might also come in handy for getting around in a hurry or for some unique battle maneuvers.