It could be possible if there is a powerful magic item involved. For example, a magical artifact from the Harry Potter world that, when combined with some high - tech gadget from the Avengers universe, gives Harry Potter wings. Another way could be through a spell cast by a powerful witch or wizard that has unforeseen consequences in the context of the Avengers' world, resulting in the growth of wings.
The plot could involve Harry trying to hide his new wings at first. He might be afraid of how the Avengers would react. But then, as the story progresses, his wings could become an asset in a big battle against a common enemy. Maybe the enemy has some sort of anti - flight technology, and Harry's magically - enhanced wings are the key to victory.
Yes, it is possible. Harry is a smart and curious boy. He has dealt with different magical creatures and spells, so he could use his intelligence to understand the basic concepts in Avengers fanfiction, like the idea of superheroes and their battles against villains.
Harry Potter might save the Avengers by using his magic to teleport them away from danger. He could use Apparition or the Floo Network if he could somehow make it work in the Avengers' world.
Harry Potter could lead the Avengers through his strategic thinking. He's had to plan against Voldemort and his Death Eaters. So he could come up with battle plans for the Avengers. He might use magic to communicate with the team over long distances, like a modified version of the Floo Network. Also, he would encourage the Avengers to embrace their individual strengths, just as he did with his classmates at Hogwarts.
He could use his invisibility cloak for stealth missions with the Avengers.
Well, Harry Potter might assist the Avengers in fanfiction by providing unique forms of transportation. His ability to apparate or use the Floo Network could be a great advantage for the Avengers. Also, his experience in fighting dark magic could give the Avengers new strategies against their powerful foes.
Well, in fanfiction, anything can happen. Maybe a spell gone wrong created a situation where the basilisk became friendly towards Harry. Or perhaps there was some kind of magical bond formed through a unique event in the fanfic's alternate universe.
Maybe Harry Potter gets accidentally teleported to the Avengers' world. His PTSD from the wizarding wars is still haunting him. The Avengers notice his strange behavior and powers. They try to help him while also dealing with threats that come their way. Harry has to learn to trust the Avengers and use his magic in this new world.
The concept of Animagus in an Avengers fanfiction could also be used for character development. Suppose an Avenger discovers they have the potential to be an Animagus. This would open up a whole new side of their personality. They would have to learn about magic, which is very different from their usual super - power knowledge. This could lead to interesting interactions with other characters, like Thor, who might be intrigued by this new form of power.
Perhaps there is a prophecy in both universes that foretells of a great danger that only the combined forces of Harry Potter and the Avengers can face. When the Avengers learn of this, they travel to the wizarding world to find Harry. They rescue him from an immediate threat so that they can all prepare to face this greater danger together. The Avengers could introduce new ways of fighting and thinking to Harry, while Harry could share his knowledge of magic with them.