Scarlet Witch could be the most crucial. If she is written to fully realize and control her powers earlier. She could single - handedly take on Thanos and his army. Her reality - warping abilities could be used to not only defeat Thanos but also to restore all the damage he had done across the universe without the need for complex time - travel plans.
In a rewrite fanfiction, perhaps Loki could have faked his death all along. He could then return during the events of Endgame, bringing with him an army of Asgardians he had secretly been gathering. His cunning and strategic mind could add a whole new layer to the battle plans against Thanos and his forces.
Captain America would be very important. He has always been the moral compass of the Avengers. His leadership skills and ability to bring the team together would be crucial in a reunion. He can bridge the gaps between different members, whether it's Iron Man's tech - based thinking or Thor's more otherworldly approach.
However, it might also be one of the Avengers. For instance, Iron Man could be important as he has the closest connection to Jarvis in the original lore. His relationship with Jarvis, both in the fanfiction and in the general Marvel universe, could drive the plot forward, especially if there are elements related to his father, Howard Stark.
One popular pairing is Harry Potter and Captain America. They both have a strong sense of justice and leadership. People like to imagine them sharing their experiences and learning from each other. Another is Hermione and Tony Stark. Hermione's intelligence and thirst for knowledge would match well with Stark's genius in technology.
Combining Doctor Strange and Shoto Todoroki could result in a very powerful character. Doctor Strange has his mastery over magic, with the ability to create portals, manipulate time, and use various spells. Shoto Todoroki has his ice and fire Quirks. The combination would mean that this new character could use ice and fire attacks while also being able to use magic to control the battlefield. They could freeze enemies and then shatter them with fire spells or use portals to surprise opponents.
Loki is another favorite. His mischievous nature means that he could cause all sorts of chaos during time travel. He might try to take advantage of the time - jumping to create his own power base in different timelines or even try to outwit Thanos in ways that the other Avengers can't.
Gandalf from The Lord of the Rings. Imagine him showing up in the Marvel universe, using his magic to help the Avengers. His wisdom and powerful spells could be a great addition, especially in a battle against a powerful foe like Thanos. He could also offer different perspectives on heroism and sacrifice.
Thor is very popular in post - Avengers Endgame fanfiction. His journey of self - discovery after Endgame, from being out of shape and depressed to finding a new path, is a rich area for fanfic writers. Wanda Maximoff is also a favorite. Her power and the emotional turmoil she went through in Endgame, especially with Vision's death, are often delved into. Additionally, Clint Barton, with his complex past as Ronin and his family life, is a character that many fanfic authors like to focus on in the post - Endgame world.
Sure, there are. They expand on the events and characters from the movie, offering additional depth and perspectives.
The most interesting part is the crossover of different powers. For example, seeing Thor's lightning powers interact with Harry's magic spells is really cool.