Perhaps the fanfic could explore how Harry grows up in Thanos' domain. He could be trained in combat and in the use of the Infinity Stones. But as he gets older, he starts to question Thanos' motives. For example, when Thanos decides to snap his fingers, Harry could try to interfere and save half of the universe from disappearing, leading to a big showdown between father and son.
In a 'Harry son of Thanos fanfic', it could also be that Harry has some unique powers inherited from Thanos. He could use these powers to travel between different realms. He might meet characters from the Harry Potter universe who are also in some other dimension. This could lead to an interesting crossover where he tries to combine the magic from that world with the power of the Infinity Stones to create a new form of defense against his father's tyranny.
In this fanfic, Naruto being the son of Thanos could lead to a whole new power dynamic in the Naruto universe. His powers could be a blend of Naruto's chakra abilities and Thanos' strength and reality - warping powers. He may be in a constant battle within himself, as Naruto's values of friendship and protecting the village conflict with the more self - serving and power - hungry aspects of Thanos' nature. He might have to find a way to reconcile these two sides to become a true hero in his own right.
Well, one possible plot could be that Harry discovers his true father is Thanos in a strange turn of events. He might struggle with the dark nature that could potentially be within him due to Thanos' lineage. Maybe he has to fight against the urge to use Thanos - like powers for evil while still trying to be the hero he was raised to be in the wizarding world.
Obviously, Thanos himself could be an antagonist at times. Since he's Harry's father, there could be a power struggle between them, with Thanos wanting Harry to follow his ways strictly. Another antagonist could be those who oppose Harry just because of his relation to Thanos. They might not trust him and try to eliminate him, thinking he'll be as evil as his father.
Well, it could be that Naruto, as the son of Thanos, has some sort of conflict between his ninja values and the power - hungry nature he might inherit from Thanos. Maybe he has to struggle with not using the Infinity Stones in the wrong way, while still trying to protect his village from other threats. He might also face discrimination from his fellow ninjas who fear his Thanos - like abilities.
One possible plot could be that Brandon has been keeping Harry's existence a secret for some reason. Maybe he's a powerful figure in a magical or special world and having a son would put Harry in danger. As the story progresses, Harry discovers his true parentage and has to deal with the new - found knowledge while also facing the challenges of this strange world he's now a part of.
The fanfic could explore the idea of Harry growing up in a different environment because of Delia. Instead of the Dursleys, he could be raised in a more magical and nurturing setting provided by Delia. This would shape his character in a different way, making him more confident and perhaps less naive in some aspects. His relationships with his friends at Hogwarts might also be affected as he has had a different upbringing compared to the original story.
Well, it could be about Harry's son getting lost in the wizarding world. Maybe he's exploring a new part of Hogwarts and gets trapped in a secret chamber. Or perhaps he's lured away by some dark magic users who want to use him against Harry.
In a 'Harry Potter son of Loki' fanfic, the plot might revolve around Harry's struggle to balance his two identities. On one hand, he's a wizard in the magical world of Hogwarts, and on the other, he's the son of a Norse god. This internal conflict could lead to external conflicts as well. For example, some of his friends at Hogwarts might be suspicious or even afraid of his newfound heritage. Meanwhile, in the Asgardian realm, he might be seen as an outsider because he was raised in the wizarding world. He has to find a way to bridge these two worlds and prove himself worthy in both.
The plot could be that Snape discovers he has a deeper connection to Harry. Maybe there was some magic involved in the past that bound them in a way. Snape then starts to take on a more protective role. For instance, he could interfere when Harry is in danger from some dark wizards who are still lurking after the war.
Well, one possibility could be that Harry discovers his connection to Yoruichi in a very unexpected way. Maybe through some ancient magic or a hidden prophecy. He then has to navigate the wizarding world with this new knowledge while also dealing with the normal challenges like Voldemort. He might inherit some unique abilities from Yoruichi, like enhanced speed or agility, which could give him an edge in battles.