There are likely many such fanfictions out there. You could also check some Harry Potter or Avengers fanfiction communities on social media platforms like Reddit. Fans often share their favorite works or even write their own. They might be able to point you towards a 'Harry is an Avenger' fanfiction.
One good Stiles - Avenger crossover is 'Stiles in the Marvel Universe'. It has an interesting plot where Stiles uses his wits from the Teen Wolf world to interact with the Avengers. Another is 'Stiles and the Avengers: An Unexpected Alliance' which shows how Stiles' unique skills could be useful to the Avengers.
I'm not sure about a specific 'bella is a avenger fanfiction' off the top of my head. But you can try searching on fanfiction websites like Archive of Our Own. There are likely many stories with that concept, and you can filter by popularity, ratings, etc. to find a good one.
Yes, there are quite a few out there. Some focus on Harry's unique abilities being transferred into the Death Avenger universe, creating really interesting crossovers. For example, there are fanfics where Harry uses his magic in unexpected ways within the Death Avenger setting.
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.
If Harry Potter became an Avenger, it could lead to interesting crossovers and storylines. His experiences in the wizarding world could give him a different perspective in battles against villains.
In many fanfictions, Harry might have gained unique powers or skills that caught the Avengers' attention, leading to his inclusion.
One great 'Hermione and Avengers' fanfiction is 'Hermione in the MCU'. It has an interesting plot where Hermione is transported to the Marvel Cinematic Universe and interacts with the Avengers in a unique way. The author does a great job of blending the magic from Hermione's world with the superhero aspects of the Avengers.
A really engaging fanfiction is 'When Spiderman Met the Original Avengers'. It takes place in a different timeline where Spider - Man meets the first - generation Avengers earlier than in the regular storylines. The story explores how his presence changes the dynamics of the team from the very beginning and how they all learn from each other.
Yes, it can be an interesting concept. Combining the magical world of Harry Potter with the superhero universe of the Avengers could lead to some really creative fanfiction. For example, imagine Harry Potter using his magic in a battle alongside Iron Man or Captain America. It would be a mash - up of two very different but equally beloved fictional universes.
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.