One idea could be a crossover with Spider - Man in an alternate universe where the Green Goblin teams up with Doctor Octopus against a more powerful and darker version of Spider - Man. They could form an uneasy alliance to take over the city's criminal underworld.
A crossover with the Fantastic Four could be interesting. The Green Goblin might target the Fantastic Four's technology. He could try to steal Reed Richards' inventions to enhance his own weaponry and glider, which would bring him into direct conflict with the superhero team.
Another possibility is a crossover with Iron Man. The high - tech gadgetry of Iron Man could be compared and combined with the Green Hornet's own tech. They could collaborate to stop a tech - savvy villain who is stealing advanced technology from both of their arsenals. This would bring together two very different yet tech - oriented heroes.
For a Goblin Slayer crossover fanfiction, consider a crossover with 'Harry Potter'. The Goblin Slayer could be transported to the wizarding world. He would be confused by the magic there at first, but then realize that goblins also exist in this world. He could team up with Harry and his friends to stop a goblin - related dark magic plot. This would bring a unique mix of the gritty, down - to - earth fighting style of the Goblin Slayer with the magical world of 'Harry Potter'.
How about a crossover with 'Fairy Tail'? The Goblin Slayer's serious and methodical approach to slaying goblins could contrast with the more flamboyant and magic - using mages of Fairy Tail. They could team up to fight goblins that have been magically enhanced or are causing trouble in the Fairy Tail world.
One idea could be that the Green Lantern Corps discovers a threat that has its origin in the Marvel Universe, like a powerful artifact from Asgard that is being misused. The Green Lanterns then have to team up with the Avengers to retrieve and safeguard it. Another plot could involve a character like Hal Jordan being accidentally transported to the Marvel Universe and having to work with Spider - Man to find his way back home while also facing a common enemy.
One idea could be that the Goblin Slayer gradually gains the affection of various female characters as they see his unwavering dedication to slaying goblins. For example, a priestess might develop deeper feelings as she witnesses his selfless protection of the village. Another could be a female warrior joining his cause and falling for his combat skills and quiet determination.
One interesting 'Naruto Green Goblin fanfiction' could be about Green Goblin somehow ending up in the Naruto world and causing chaos among the ninja villages. Maybe he tries to take over with his advanced technology against the ninja's jutsu.
A really interesting plot could be that a goblin mate has a unique magical ability that is the key to saving Hogwarts from a new dark threat. The wizarding characters initially doubt the goblin but gradually come to realize their importance and the power of their bond.
One idea could be that Naruto is somehow transported to the world of Goblin Slayer. He could use his shadow clone jutsu to confuse the goblins and then use his rasengan to take out large groups. Another could be that the Goblin Slayer visits Konoha and Naruto has to teach him about the concept of chakra.
A great plot could be that the goblin is a time - traveler. It has come from a future where Voldemort has won and is trying to change the past. The goblin teams up with Harry, using its unique goblin magic and knowledge of the future to give Harry an edge in the fight against the dark forces. They might have to travel to different magical locations and enlist the help of other magical creatures.
One possible plot could be that the Guardians from Destiny are called to the world of Goblin Slayer due to some strange energy anomaly. They team up with the Goblin Slayer to fight against an army of goblins that have been enhanced by a Darkness - like power. The Guardians' advanced technology and powers would make for an interesting contrast with the more medieval - style combat of the Goblin Slayer.