The character exploration. Arno Stark is a relatively new and interesting character. Fanfics allow us to understand him better, his backstory, his ambitions, etc.
One great Arno Stark MCU fanfic is 'The Legacy of Arno Stark'. It delves into his character development in the MCU universe, exploring his relationships with other characters. It has a really interesting plot that keeps you hooked from start to finish.
I don't believe the MCU ruined Tony Stark's character. In fact, it expanded his story and introduced him to many who may not have known about the comics. There were some differences, but they were mostly creative interpretations that added to his appeal.
The MCU timeline would be significantly different. In the early Iron Man movies, Natasha could have been introduced as Tony's sister much earlier. This would have changed the dynamic of his character development. He might not have been as reckless in some situations because he had a sister to think about. Also, in Natasha's storylines, having Tony as a brother could have provided her with more resources and support, changing the way she approaches her missions and relationships with other characters in the MCU.
If Tony Stark were raised by Peggy Carter in fanfiction, it could drastically change the MCU timeline. For starters, Tony's personality might be different. Peggy was a strong - willed and disciplined person. Growing up under her influence, Tony might be more by - the - book and less of a maverick. His approach to technology could also be different. He might focus more on military applications that align with Peggy's values rather than the more commercial and sometimes unethical applications he pursued in the original timeline. Also, his relationship with Howard Stark would be complex. Instead of the distant and often troubled relationship they had, it could be one of mentorship from Peggy's perspective, with Howard having a different role in Tony's life.
They contribute in several ways. Firstly, they keep the fans engaged between movie releases. They also introduce new concepts and ideas that might later be incorporated into the movies. For instance, some new villains or plot twists can first be tested in the graphic novels. Also, they can provide different interpretations of the characters, adding more dimensions to the overall MCU franchise. Moreover, they can attract new fans who are more into reading graphic novels rather than just watching movies.
Not always. While the MCU draws inspiration from the comics, there are often changes and adaptations made to fit the cinematic universe and modern audiences.