Well, Nico could use his powers to surprise the Avengers. Maybe his shadow - traveling ability would come in handy during a battle, like he could quickly transport himself and some Avengers to strategic locations.
It could also be James. James is a natural leader and is always looking to include interesting people in his circle. When he sees Nico, he might sense that there's something special about him. He'd probably start by asking Nico about his abilities and before long, they'd be chatting like old friends. Plus, James has a big heart and would be accepting of Nico quite quickly.
Well, it could be about Nico Di Angelo using his underworld powers to help the Avengers in a battle against a powerful villain who has the ability to raise the dead. Maybe he teams up with Doctor Strange to close portals to the underworld that the villain is using to summon hordes of zombies.
Loki could be a great main antagonist. He might see Nico Di Angelo as a new plaything or a threat to his plans. Since Nico has powers related to the underworld, Loki could try to manipulate him or use his powers for his own evil schemes, which would put him in direct conflict with the Avengers.
The storyline could involve Nico adjusting to life in the Avengers' compound. He might use his powers from the Percy Jackson universe in unique ways to help the Avengers in their battles. For example, his ability to control the dead could be used to gather intel from fallen enemies.
Nico could be a valuable addition in terms of his unique powers. His ability to manipulate shadows and travel through them would give the Avengers an edge in stealth operations.
In a fanfiction where Nico di Angelo meets Dumbledore, there are numerous possibilities. Nico might be initially distrustful of Dumbledore, given his own experiences with authority figures. However, Dumbledore's calm and kind demeanor could gradually break down Nico's walls. Dumbledore could introduce Nico to the wonders of the wizarding world, such as spells and magical artifacts. Nico, in turn, could show Dumbledore some of his demigod abilities, like shadow - traveling. Their meeting could also lead to a cultural exchange of sorts, with Nico learning about Hogwarts and Dumbledore getting a peek into the life of a demigod.
In such a fanfiction, there could be an epic battle. Nico's powers from the Percy Jackson universe might clash with the Winchesters' hunting skills. Maybe they initially misunderstand each other, thinking the other is a threat. But then they could realize they are all fighting against some form of evil and team up. For example, Nico could use his ability to control the dead to help the Winchesters deal with a horde of zombies, while the Winchesters could teach Nico some of their combat tactics against demons.
Another storyline could involve Nico being on a quest in his own world, but it somehow intersects with Gotham. For instance, a powerful magical item has been stolen and ends up in Gotham. Nico follows it there and meets Batman. At first, they don't see eye to eye as they have different methods. But as they face challenges together, such as fighting off the villains who also want the item, they start to understand and trust each other more. This could lead to a long - term friendship or at least an alliance where they help each other out in future situations.
One possibility is that Nico, with his powers over the dead, could really freak out Batman at first. Batman is used to dealing with normal criminals and the occasional super - villain with scientific powers. Nico's dark and otherworldly abilities would be something completely new to him. Maybe Nico would mistake Batman for some sort of undead creature at first because of his all - black costume and brooding nature.