A powerful ancient vampire lord could be the main antagonist. He could be so old and strong that he has knowledge and powers that both D and Van Helsing have never faced before.
One possible plot could be that Vampire Hunter D and Van Helsing team up to hunt a powerful vampire that has been terrorizing both their worlds. D's unique dhampir abilities combined with Van Helsing's knowledge and skills would make for an exciting adventure.
Another interesting piece is 'Beyond the Darkness'. This fanfiction takes place in a post - apocalyptic world where vampires have overrun most of the land. D and Van Helsing must navigate through hordes of the undead while also dealing with their own personal demons. It's a darker take on the two characters and their possible relationship.
First, you need to study the source materials. Know the personalities, abilities, and backstories of both D and Van Helsing. For example, D is a dhampir with superhuman strength and speed, and Van Helsing is an experienced vampire hunter with a vast knowledge of vampire lore. Then, come up with an interesting plot. It could be a new threat that only they can defeat together.
Imagine a scenario where the wizarding world of Harry Potter and the monster - hunting world of Van Helsing collide. Harry, with his friends Hermione and Ron, could meet Van Helsing while on a mission outside of Hogwarts. Van Helsing might be initially skeptical of their magic but soon realizes its potential. They could team up to fight a common enemy, perhaps a dark wizard who has been using dark magic to create super - powerful vampires or werewolves. Harry could use his invisibility cloak to get close to the enemy, while Van Helsing readies his weapons. Hermione's vast knowledge of magic could be used to counter any dark spells the enemy throws at them, and Ron could provide some comic relief as well as his own brand of magic in the fight. This crossover could open up a whole new world of adventures and challenges for both sets of characters.
It's hard to say. Harry has magic, which gives him a wide range of abilities. But Van Helsing has years of experience in fighting monsters. So it could depend on the situation.
Another theme is the exploration of different supernatural worlds. When Van Helsing enters the realm of another supernatural - themed story, like a crossover with a werewolf - centered story, it allows for an in - depth look at how different supernatural creatures interact. There's often a power struggle or a need for cooperation between them. For example, in a crossover with a story about witches and vampires, Van Helsing might have to team up with the witches to fight a common vampire threat.
The interaction between Dumbledore and Van Helsing would also be quite interesting. Dumbledore is a very wise and powerful wizard, and Van Helsing is a skilled hunter. Dumbledore might be interested in Van Helsing's understanding of the darker side of the non - magical supernatural world. Van Helsing, in turn, could be in awe of Dumbledore's magical power and wisdom. They could have deep conversations about good and evil, and how to protect their respective worlds from the encroaching darkness.
In the Van Helsing novel, Van Helsing is the central figure. He is a character with great knowledge of the supernatural. There might be characters like a young woman who has been bitten by a vampire and is in a state between life and death. Van Helsing tries to save her. Then there are the creatures themselves, like the powerful vampire lord who is the main source of the evil in the story. There could also be some side characters, like an old priest who provides Van Helsing with some useful information about the history of the vampires in the area.
Alucard from "Hellsing" would be a great addition. His overpowered nature and complex personality would contrast well with D's stoicism. They could have an interesting dynamic, either as allies or enemies depending on the plot.
One great van helsing crossover fanfiction is 'Van Helsing in the World of Dracula Untold'. It combines the dark and brooding atmosphere of Van Helsing with the unique vampire lore of Dracula Untold. The story has Van Helsing facing off against the vampires in this new and different setting, creating exciting and intense battles.