What are some interesting plot ideas for 'devil survivor 2 crossover fanfiction'?

One interesting plot idea could be a crossover between the Devil May Cry universe and the Castlevania universe. The protagonist with Devil Trigger ability could find himself in the dark and haunted world of Castlevania. He has to use his powers to fight off the hordes of demons and undead creatures that are native to Castlevania. Maybe he teams up with a Belmont character and they exchange combat techniques and knowledge about their respective worlds.

One idea could be a survivor in a post - apocalyptic world who has to deal with not only the usual threats like lack of food and water but also new, mutated creatures. Another could be a group of survivors on a deserted island where they discover a hidden, ancient civilization. Or perhaps a survivor in a war - torn city who forms an unlikely alliance with an enemy combatant to stay alive.

One idea could be that Pennywise from 'it' somehow enters the world of 'Devil May Cry'. Dante could mistake Pennywise for a particularly grotesque demon and engage in a battle. Pennywise, with his shape - shifting abilities, would constantly change forms to try and deceive Dante. Another plot could involve the characters from 'Devil May Cry' being lured into Derry by Pennywise's illusions. They then have to fight their way out while also dealing with the psychological warfare that Pennywise is known for.

One idea could be that Devilman and Devil Lady team up to fight a common enemy that is threatening both their worlds. Maybe a powerful demon from another dimension is trying to take over, and they have to combine their powers to stop it.

Another interesting concept is to cross the devil fruits with the world of Harry Potter. Imagine a character with a devil fruit ability like the ability to turn into an animal (zoan type) trying to blend in at Hogwarts. They might have to hide their powers from the wizards while also using them to their advantage in the magical world, like using their animal form to explore hidden areas of the school.

One idea could be Dante from Devil May Cry being summoned to the world of Devilman by Akira. Akira could seek Dante's help to fight against a new type of devil that is beyond his capabilities. Dante, with his arsenal of weapons and devil - slaying skills, would then team up with Akira in his devilman form to take on this new threat.

A plot could revolve around a new enemy that threatens both the world of How to Train Your Dragon (where Toothless is from) and the Devil May Cry universe. The characters from both universes have to team up. For example, Vergil might be initially skeptical of Toothless but then come to respect his power. Toothless could also interact with the different weapons and magic in the DMC world in an interesting way.

A crossover with the Castlevania universe would also be cool. Dante could find himself in Dracula's castle, facing off against classic Castlevania monsters while also dealing with his own demonic foes. It would be interesting to see how he interacts with the Belmonts.

One idea could be a crossover with 'The Texas Chainsaw Massacre' family. The Devil's Rejects could team up with the Sawyers in some sort of mayhem - filled adventure against a group of bounty hunters. They could combine their unique styles of horror and chaos.

A possible plot is a magical artifact from Fairy Tail's world that is sought after by demons in Devil May Cry's universe. The Fairy Tail gang teams up with the Devil May Cry crew to protect it. The artifact might have the power to either destroy all magic or enhance it to uncontrollable levels. Dante and Natsu could have a friendly rivalry over who is stronger and who gets to fight the main villain. Another plot idea is that some of the Devil May Cry characters are sent back in time to the Fairy Tail world's past. They have to adapt to the magic - based society and help the Fairy Tail founders with a great threat that was once thought to be long forgotten.