One possible story could be that Tony Stark discovers a secret assassin organization within his own company. He uses his intellect and Iron Man technology to expose them while also having to keep his identity as the one investigating a secret. This would add an exciting new layer to his character as he battles not just supervillains but also corporate corruption and hidden threats.
One interesting fanfiction could be where Tony Stark's secret identity is discovered by an ordinary citizen who then has to decide whether to expose him or protect him. This creates a whole new dynamic as Tony has to deal with this unexpected threat to his double life.
Another plot twist might be that Tony's assassin identity was a ruse he created himself. He faked being an assassin to infiltrate a powerful criminal syndicate. But as he gets deeper into the syndicate, he starts to lose himself in the role and actually begins to question his own morality. This would create a lot of internal conflict for Tony and make for an interesting character study.
A plot could also be that Tony creates a new secret identity to infiltrate a criminal organization. He has to completely change his appearance and mannerisms to blend in. This could lead to some humorous situations as he tries to act like a criminal while still holding onto his moral compass as Iron Man, and also some intense action scenes when his cover is nearly blown.
One popular type of fanfiction could be about Tony Stark's daughter joining the Avengers. Maybe she inherits his genius and creates her own high - tech suit. She might struggle at first to be accepted by the existing Avengers, like Iron Man did. But through her skills and determination, she gradually wins them over and becomes an important part of the team.
On Tony Stark's birthday, the Avengers planned a huge surprise party. Pepper had spent weeks coordinating with everyone. They decorated the Stark Tower with lights and streamers. Thor brought Asgardian mead, and Captain America made a heartfelt speech about Tony's contributions to the team. Tony walked in, looking dapper as always, and was genuinely touched by the gesture. It was a day filled with laughter, celebration, and a lot of tech talk as Tony showed off his latest inventions.
Another idea for this fanfiction could be that Tony Stark's daughter starts as a sort of 'Avengers - in - training'. She is constantly trying to prove herself to the established members. There could be a lot of action - packed scenes where she is in dangerous situations but manages to use her wits and any skills she has learned from her father to get out of them.
In a time travel fanfiction involving Morgan Stark, perhaps she travels back in time to a crucial moment in her father's life, like the battle of New York. She uses her knowledge from the future to help him, but also has to be careful not to disrupt the timeline too much. Morgan might end up forging a new bond with her father that was different from the one she had in her own time.
A fanfiction on this might focus on the psychological impact of the Extremis injection on Tony. He could be struggling with the newfound power, fearing that he's losing his humanity or becoming something he doesn't want to be. It might also explore his relationships with other characters like Pepper or Rhodey in this new context.
One possible explanation for Tony Stark having suicidal tendencies in fanfiction could be his constant struggle with guilt. In the MCU, he witnessed a lot of destruction and felt responsible for many tragedies. Fanfic writers might explore how this guilt eats at him and leads to such dark thoughts. For example, after the events of 'Civil War', he might be plagued by the idea that his actions tore the Avengers apart, endangering the world more. This could be a starting point for a fanfiction delving into his suicidal tendencies.
In a Tony Stark Avengers toy fanfiction, imagine the toys are actually miniaturized versions of the real heroes. Tony Stark's toy is the most advanced. It can repair the other toys when they get damaged. A villain tries to steal the Stark toy to reverse - engineer its technology for evil purposes. The other toys, with the leadership of the Stark toy, must fight to protect themselves and the world from this threat.