One idea could be exploring an alternate universe where Tony Stark's best friend Rhodey becomes the main Iron Man instead. He could have a different fighting style and face unique challenges.
First, you need to know the characters well. Watch the series or read the comics related to Iron Man Armoured Adventures. This will give you a good understanding of Tony Stark's personality, his relationships, and the world he lives in. Then, come up with a unique concept. It could be a new villain, a different setting, or an unusual plot twist. For example, you could start with a simple idea like 'What if Iron Man had to fight in a world without electricity?'
One idea could be Ultron taking over the armor of Iron Man and using it for his own evil purposes. He could then start attacking the city while people think it's Iron Man gone bad.
A crossover with Spider - Man could be cool. In the fanfic, Spider - Man could be intrigued by Iron Man's high - tech armors in the Armored Adventures world. They could work together to stop a tech - based criminal who's stealing Stark tech and using it for evil in New York City.
One idea could be exploring Tony Stark's new inventions after the events of previous movies. Maybe he creates a new type of suit that can travel through dimensions.
In Iron Man 3 fanfiction, a common theme is the expansion of the Iron Legion. Some stories might have the Iron Legion being used for civilian rescue operations on a large scale. There could also be fanfictions that explore the villains in more detail. For example, exploring Aldrich Killian's backstory more and what led him to become the way he was, and how his relationship with Tony could have been different.
There might be a fanfiction where Iron Man has to deal with a malfunction in his armor that causes him to lose some of his powers temporarily. This could lead to a more character - driven story as he has to rely on his wits and the help of his friends more than his usual high - tech gadgets. In the Armored Adventures world, this could introduce new challenges and character developments.
One idea could be to explore his origin story in more depth. Maybe he has a hidden family or a past trauma that shaped him into the man of iron. Another could be to put him in a different time period, like the future where technology has advanced even more and he has to adapt.
A great idea for 'Man in the Iron Mask' fanfiction would be to focus on the relationships within the prison. How did the guards interact with the man in the iron mask? What if there was a sympathetic guard who secretly helped him? You could also introduce other prisoners who befriend the man in the iron mask and together they plan an elaborate escape. This would add more depth to the story and show different perspectives within the prison walls.
One interesting character to cross over with Iron Man is Wolverine. Wolverine's rough - and - tumble nature and his healing factor would be a great contrast to Iron Man's high - tech gadgets. Black Widow could also be a great addition. Her spy skills and combat abilities would add a new dimension to the story. And Hulk, the big green behemoth, would be a force to be reckoned with, and the interaction between him and Iron Man would be full of drama.
In some Iron Man harem fanfiction, it could be that Tony Stark is transported to an alternate dimension where the rules of relationships are different. There, he finds himself surrounded by female characters who are all vying for his attention. The story could explore how he navigates this new world and these new relationships while still trying to be the hero he is.