One great 'Avengers Vision' fanfiction is 'Vision's Quest'. It delves deep into Vision's struggle to understand his humanity. Another is 'Vision and Wanda: A New Beginning' which focuses on their relationship. And 'The Vision in the Modern World' is also interesting as it shows how Vision adapts to a world that is both in awe and a bit scared of him.
One interesting aspect of Wanda and Vision in fanfiction could be exploring their relationship in alternate universes. In some fanfics, they might face different challenges that test their love and loyalty more severely than in the main MCU storyline.
One more plot idea is that a new villain targets Wanda specifically because of her relationship with Vision. This villain could try to manipulate or break their relationship, leading to a story full of drama, action, and the exploration of their love and commitment to each other.
Often, Bobby Drake is paired with Iceman - related characters in Avengers fanfiction. For example, Emma Frost might be paired with him as they both have connections to the X - Men universe which sometimes cross - over into Avengers fanfiction. Another character he's often paired with is Storm. Their elemental powers - ice and wind/weather - can create some really interesting storylines when they team up in Avengers - related adventures.
One reason is Vision's powers. Fanfiction writers can create really cool scenarios where Vision uses his powers in new and exciting ways. Also, his role in the Avengers team is interesting. In fanfictions, we can see different takes on how he interacts with the other members, like his philosophical conversations with Tony Stark. Moreover, his origin story can be further explored, which is always fascinating.
A fanfiction could explore the relationship between Wanda and Vision deeper. In Infinity War, they are constantly in danger. What if they had a moment where they could actually talk about their future? Like, if they survived, would they leave the Avengers and start a new life? Wanda might be hesitant because she has found a family in the Avengers, but Vision would be more inclined towards a peaceful life away from all the chaos.
I'd say Avengers are stronger. They have a diverse team with powerful members like Thor and Hulk.
Doc Louis is often paired with Little Mac in fanfiction. Since Doc Louis is his trainer in the game, in fanfiction they can have deeper conversations about strategy and life. For example, Doc Louis might give Little Mac some ancient boxing wisdom that helps him in a crucial match.
Clemont is also often paired with Ash in interesting ways in fanfiction. They could be on a scientific exploration in Kalos, where Clemont's inventions play a crucial role in their adventures. Their friendship might be developed in a different way, like they have to rely on each other more than in the original series to overcome some big challenges related to Pokémon and the Kalos environment.