Some fanfictions give Tony Stark the power of mind control over technology. So not only can he build amazing tech, but he can also make other machines do his bidding without any physical connection. It's like he becomes a technological wizard. This power makes him even more formidable in battles against his foes as he can turn their own weapons against them.
In fanfiction, Tony Stark might have enhanced intelligence powers. He could solve complex problems at a super - fast speed, like coming up with new energy sources in minutes. His suit could also have new abilities, like teleportation. For example, he could zap himself from one side of the planet to the other to stop a disaster.
One great 'Tony Stark has powers' fanfiction is 'Powered Iron Man'. In it, Tony gains the power to manipulate energy on a molecular level. It makes for some really cool battle scenes where he can use his new power in creative ways along with his suit's technology.
Maybe he doesn't fully understand his powers yet. Tony Stark is a scientific genius, but new powers might be beyond his current understanding. He could be worried that if he reveals them too soon, he won't be able to control them properly and might cause harm. So, he chooses to hide them while he studies and figures them out.
Pepper Potts. She is very close to Tony and knows him well. She might notice some strange behavior or small signs that lead her to suspect he has hidden powers. For example, he might unconsciously use his powers in a moment of stress or danger when he thinks no one is looking.
One interesting storyline could be Tony's early experiments in his father's workshop. He might be tinkering with small gadgets, getting in trouble for using expensive parts. Another could be his relationship with his parents at a young age, like how he coped with his father's high expectations.
One quirk could be his extreme dedication to his inventions. In fanfiction, he might be shown spending days on end in his lab without sleep, completely absorbed in creating a new piece of tech. Another quirk could be his snarky remarks even in the most serious situations. For example, when facing a powerful enemy, he still manages to make a sarcastic comment, which is very in - character for him. Also, his over - protectiveness towards those he cares about, like Pepper or Rhodey, can be a quirk that is often explored in fanfiction.
He could have the power of technopathy. Since Tony is already so connected to technology, as a mutant, he might be able to directly communicate with machines and control them with his mind. This would give him an even greater edge in creating and operating his Iron Man suits.
One idea could be a story where Tony discovers a hidden diary of Howard's that reveals secrets about his early inventions and the true motives behind some of his actions. This could lead to Tony having a new perspective on his father and his own work.
One interesting story could be about Tony Stark's AI assistant getting a new upgrade that gives it emotions. It then has to navigate the world of human feelings while still serving Stark. Another might be a fanfiction where the assistant has to take over Stark's operations when he goes missing, facing challenges like dealing with his enemies and managing his business.
One interesting story could be where Tony Stark faces a new and extremely dangerous villain that not even his high - tech suits can easily defeat. This forces him to use his wits in a whole new way.
In some fanfictions, Thanos and Tony Stark have a more personal connection. For example, Thanos has a past encounter with Howard Stark (Tony's father) that changes the whole dynamic. This could lead to a story where Thanos has a different view of Tony, and Tony has to grapple with this new information while trying to save the universe.