One interesting Thanos and Tony Stark fanfiction could be where they have to team up against an even greater threat in the universe. Maybe a new powerful alien race emerges that is set on destroying all life, and Thanos, with his knowledge of different planets and Tony Stark with his technological genius, are forced to put aside their differences. In this kind of story, we might see Tony trying to outwit Thanos at times while also learning from his vast experience in the cosmos.
There could be a fanfiction where Thanos, after the events of Infinity War, somehow gets a second chance. He ends up on Earth and meets Tony Stark in a more peaceful setting. Stark tries to rehabilitate Thanos, believing that there's good in everyone. This would be a story full of character development, as Thanos has to adapt to a non - warlike environment and Tony has to deal with the moral implications of helping a former enemy.
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.
Well, in some 'Tony Stark Fights Thanos' fanfiction, there's a plot where Tony manages to hack into Thanos' mind through some super - advanced tech he's developed. This allows him to create illusions in Thanos' head, confusing him during battle. Also, a common plot is that Tony sacrifices himself in a very heroic way. He uses all his suit's power and some experimental tech to send Thanos into a different dimension or something like that, saving the universe at the cost of his own life.
One interesting scenario could be Tony Stark using his superior intellect to outwit Thanos in a battle of wits rather than just brute force. He might create a device that can nullify the power of the Infinity Stones for a short time.
In some fanfictions, Tony Stark kills Thanos by outsmarting him in a battle of wits. He could set up a series of elaborate traps and illusions that deceive Thanos into a vulnerable position. For instance, he might create false Infinity Stones that Thanos is lured into trying to obtain, only to find they are booby - trapped. Then, while Thanos is distracted, Stark delivers the fatal blow. Or, Stark could use his Iron Man suits in a very creative way. He could send a swarm of mini - suits to attack Thanos from all directions, overwhelming him and finally finding a way to kill him.
In this scenario, it would be a complete shocker. Tony Stark is a hero, and Thanos is a villain. If he were to join Thanos, it might be because Thanos somehow convinced him that his plan was for the greater good. Maybe Thanos showed him a future where overpopulation and resource depletion were so bad that his 'snap' was the only solution. But this would go against everything Stark stands for, so it would be a very complex and dark turn for his character.
In fanfiction, their interactions can also be very tense. Tony might try to use his sarcasm and intelligence to taunt Thanos, while Thanos, with his calm and collected demeanor, would simply brush it off. Sometimes, Thanos might even admire Tony's tenacity in the face of such overwhelming power, which could lead to some interesting exchanges between them.
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.
One interesting story could be about Tony Stark dealing with post - Avengers trauma in therapy. He might struggle to open up at first, but gradually starts to face his inner demons. The therapist could be a new character who has to navigate Tony's complex personality.
One interesting 'Tony Stark prison fanfiction' could be about him using his genius to engineer an escape while also facing his inner demons in the solitude of prison. Maybe he forms unexpected alliances with other inmates who have skills he can utilize.