In a Thanos and Peter Parker fanfiction, it could be set in an alternate universe where Thanos has already won. Peter Parker is one of the few remaining heroes. He has to go undercover and try to find a way to reverse what Thanos has done. Peter uses his street - smart skills from Queens to blend in among the survivors and slowly gather information about Thanos' weaknesses. He might even form an unlikely alliance with some of Thanos' minions who have second thoughts about their master's actions.
The idea of an unlikely friendship or more can be a theme. Since they are from different worlds in the Marvel universe, seeing how they come together and form a bond, whether it's platonic or romantic, is a theme that many fanfics might explore. For example, they could team up against a common enemy that neither could face alone, and during that time, their relationship develops.
In the fanfiction, Peter Quill Parker might have some new powers or gadgets that give him the edge. He could have studied Thanos' fighting patterns and found a way to counter them. Also, his quick thinking and ability to improvise in tough situations would play a big role. He might even use his charm to get close to Thanos and then strike when he least expects it.
Well, it's a really wild concept. One way to think about it is that Peter's sense of justice and kindness could gradually influence Thanos in this fanfic. Maybe he tries to show her that there are other ways to deal with the universe's problems rather than just wiping out half of the population.
One key element is the power dynamic. Thanos is extremely powerful, with the Infinity Stones, while Peter has his spider - abilities. So, how Peter overcomes or at least contends with Thanos' power is a big part. Another element is the moral conflict. Thanos has his own warped sense of right and wrong, and Peter has his strong moral compass. Writers often explore how these two different viewpoints clash.
Peter would probably be scared at first. He's just a kid, after all, and being kidnapped by a powerful being like Thanos is terrifying. But he would also be defiant. He has a strong sense of responsibility, so he might try to find a way to escape on his own.
Fanfiction.net is also a good place to look. There are many authors who write about unique pairings. However, the quality can vary, so you may need to read the summaries and reviews to find the really good Thanatos x Peter Parker fanfictions.
There's a fanfiction called 'Peter Parker's Gambit Against Thanos'. In it, Peter realizes that brute force won't work against Thanos. So, he devises a series of clever plans. The story delves deep into Peter's character, showing his growth from a neighborhood hero to someone who can stand up to a universal threat like Thanos. It also has some really cool descriptions of Peter's web - slinging skills in the midst of the battle with Thanos.
One possible plot could be that Peter Parker discovers a new power within himself that gives him the edge to take on Thanos. Maybe it's a power related to the Time Stone that he manages to manipulate in a way that Thanos can't counter. He could use this power to outwit Thanos in a battle and finally deliver the killing blow.
Their daily life would be quite strange. Peter would probably still be swinging around New York, saving the day. And Thanos might be sitting at home, thinking about her grand plans for the universe, but now she has to also consider Peter's feelings about it. Maybe they have breakfast together, with Peter eating his normal human food and Thanos having some alien - like cuisine.