Some fanfictions might include new characters created specifically for the 'dark Iron Man' storyline. For instance, a brilliant scientist who either tries to stop Iron Man or is manipulated by him. And of course, Jarvis or its successor could be in the story, perhaps being corrupted by Iron Man's new dark intentions or trying to resist them.
In many 'dark Iron Man' fanfictions, villains like Mandarin could play a role. They might either be the cause of Iron Man's descent into darkness or partners with him in his dark deeds. Additionally, other Avengers such as Captain America could be there. Captain America would most likely oppose Iron Man's actions, leading to some intense confrontations between them.
In Iron Man 2 fanfiction, Tony Stark stands out as the most popular. His charm, intelligence, and superhero persona draw a lot of attention. Pepper Potts comes in second, as she is an important part of Tony's life, both personally and professionally. Writers love to explore their relationship dynamics. Additionally, Ivan Vanko, the villain in Iron Man 2, is also a popular character in fanfiction. His backstory and his vendetta against the Stark family make for interesting storylines.
Happy Hogan could be another popular character. He could be the one who teaches the son some of the more practical aspects of the Stark business and how to protect himself. And there could be new villains created specifically for the fanfiction that target the son because of his relation to Iron Man.
Tony Stark is definitely one of the most popular. Since he is the main character in the movie and has such a complex personality, he offers a lot of room for fanfiction writers to explore different aspects of him. Pepper Potts is also popular as she is an important part of Tony's life.
Obviously, Spider - Man and Iron Man themselves are extremely popular. They are the main draws as they are the two iconic heroes. But characters like Pepper Potts might also be popular as she could be involved in stories related to Iron Man's actions in the fanfiction.
Naruto is obviously a common character. He often visits the Land of Iron or gets involved in events related to it. Sasuke might also be there, as his journey often intersects with Naruto's. Then there are the samurai from the Land of Iron, like Mifune. He is a respected figure and could play a major role in fanfictions set in the Land of Iron.
Pepper Potts often plays an important role. She might be involved in helping Iron Man deal with the Ultron situation, either by providing moral support or using her business acumen to handle the fallout of Ultron's attacks. For example, she could be the one to secure resources for Iron Man to build new defenses against Ultron.
Common themes in 'A Man of Iron' fanfiction can vary. Some might center around friendship and teamwork, while others explore the concept of power and responsibility. Another popular theme is the character's journey of self-discovery.
Obviously, the dark prince himself is a central character. There might also be a loyal servant or advisor who is always by his side, like a wise old wizard who tries to guide him. And often, there will be an antagonist, perhaps another prince from a neighboring kingdom who wants to undermine the dark prince.
The hero or protagonist is also common. This is the character who is either directly affected by the prophecies or is trying to stop their dark outcomes. They could be a brave warrior, a cunning mage, or just an ordinary person thrust into extraordinary circumstances. There are also usually antagonists. These could be the ones trying to make the dark prophecies come true, perhaps for their own gain or because they believe in the 'rightness' of the prophecies' dark outcomes. For example, a power - hungry sorcerer or a fanatical cult leader.
There could be a young hero or heroine who tries to either tame the dark unicorn or understand it. This character might be on a quest for knowledge or power and sees the unicorn as a key part of that journey.