Who would be the main antagonist in a 'Harry Potter x Hisoka' fanfic?
There could be a new character created specifically for the fanfic. A dark wizard who has been observing the wizarding world from the shadows and sees Hisoka's arrival as an opportunity. This new antagonist could try to use Hisoka to achieve his own evil goals, like opening a portal to a dark dimension or stealing all the magic in the world. When Hisoka realizes he's being used, he would turn against this new antagonist, and Harry Potter and his friends would join him in the fight.
Who would be the main antagonist in a Harry Potter x Aquaman fanfiction?
The main antagonist could be a dark wizard who has mastered water - based magic and has made a pact with a powerful sea monster. This dark wizard wants to rule both the wizarding world and the underwater world. He sees Harry Potter as a threat to his plans in the wizarding world and Aquaman as a hindrance in the underwater realm.
Who would be the main antagonist in a Harry Potter x Hades fanfiction?
Another option is a powerful dark wizard from the past in the wizarding world who has been banished to the underworld. He wants revenge on the wizarding world and plans to use Hades' power to break free and wreak havoc. Harry Potter must then face this resurrected dark wizard and prevent him from using the underworld as a base for his revenge.
Who would be the main antagonist in a Harry Potter x Boromir fanfiction?
Voldemort could easily be the main antagonist. His goal of taking over the wizarding world and his use of dark magic would put him in direct conflict with Boromir and Harry. Boromir's sense of justice would not allow Voldemort's tyranny to stand, and Harry has his own vendetta against the Dark Lord.
Who would be the main antagonist in 'harry potter saves the avengers fanfic'?
It could be a powerful dark wizard who has somehow made his way into the Avengers' universe. Maybe a wizard who was banished from the wizarding world in Harry's universe and has now joined forces with some of the Avengers' villains.
Who could be the main antagonist in a 'Harry Potter x Aslan fanfic'?
It could be a new dark wizard who has somehow tapped into the power of both the wizarding world and the Narnian magic in a negative way. This wizard might want to rule both realms and is using dark magic from both to achieve his goals.
Who would be the main antagonist in a Harry Potter x Kara Thrace fanfiction?
Maybe a rogue wizard who has found a way to access the technology from Kara's world and wants to use it to rule both the wizarding world and any other world he can reach. He would be opposed by both Harry Potter, who wants to protect his world, and Kara Thrace, who doesn't want her technology misused. This wizard could combine dark magic with advanced technology to create powerful and dangerous weapons and spells.
Who would be the main antagonist in a 'harry potter and thor odinson crossover fanfic'?
It could be Loki. Since he has a knack for causing trouble, he might find a way to cross over to the wizarding world. He could manipulate the dark wizards and use their magic for his own devious plans. Maybe he wants to steal the Philosopher's Stone to gain immortality and use it to take over Asgard as well.
Who could be the main antagonist in a 'Harry Potter x Troll Market' fanfic?
A powerful dark wizard who has infiltrated the Troll Market and is using it as a base to gather dark magic items. He could be after the Elder Wand or some other powerful artifact from the Harry Potter universe and is using the chaos and secrecy of the Troll Market to his advantage. He would see Harry Potter as a threat to his plans and try to eliminate him.
Who could be the main antagonist in a 'Harry Potter x Alice Cullen fanfic'?
Voldemort could be the main antagonist. He might see Alice's vampire abilities as a threat and want to use Harry to get to her. He could also be interested in using her powers for his own dark purposes.
What could be the plot of a 'Harry Potter x Hisoka' fanfic?
A plot could involve Hisoka using his nen abilities in the wizarding world. He could be mistaken for a dark wizard at first. But then, as the story progresses, he teams up with Harry Potter and his friends. Hisoka might teach them some of his unique combat skills in exchange for learning more about magic. For example, he could show them how to use their instincts better in a fight, which could be useful against Voldemort and his Death Eaters.