I think Rhodey is often a great character in 'Tony Stark Fights Thanos' fanfiction. He's Tony's friend and he can add a lot of emotional depth to the story. He might be the one who tries to talk Tony out of some risky plans but also stands by him in the end. Also, Nebula can be really well - written. Since she has her own vendetta against Thanos, she can team up with Tony in interesting ways. She can bring her knowledge of Thanos' habits and weaknesses to the table.
Tony Stark himself is often very well - written in these fanfictions. Writers can really explore his genius, his determination, and his flaws. Another great character can be Pepper Potts. In some fanfictions, she plays a crucial role in helping Tony, like providing him with moral support or even getting involved in the fight in some way. And of course, Thanos. A well - written Thanos in these fanfictions is truly menacing, with his complex motives and powerful abilities clearly shown.
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.
Pepper Potts can also be a great addition in some of these fanfictions. Even though she's mainly related to Tony, her presence can add a different dynamic. For example, if the fanfiction is about Tony dealing with Howard's legacy, Pepper can be the voice of reason, helping Tony see things more clearly. She can also interact with the memory or apparition of Howard in some creative ways, which makes for a great read.
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.
I think in many fanfictions, the character of Tony Stark stands out. His charisma, his sense of humor, and his determination are really well - captured. And Jarvis is also very well - written in terms of his calmness and his unwavering support for Stark. He's like the voice of reason in many stories, which makes him a very interesting 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.
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.
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.
In many Tony Stark and Ultron fanfictions, Pepper Potts can be a great character. She provides a human connection for Tony and can often be the voice of reason. Also, Captain America can be a great addition. His moral compass clashes with Tony's more pragmatic approach, especially when it comes to dealing with Ultron. This creates great drama and tension in the stories.
Perhaps Stark sees the destruction that the constant battles between superheroes and villains are causing to the Earth and the universe. He might think that Thanos' radical solution is the only way to bring a long - lasting peace. He could be convinced that by joining Thanos, he can influence Thanos to be less extreme in his methods. However, this is a very dangerous gamble as Thanos is not easily swayed.
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.