One aspect that makes it sad is the backstories of the zombies. They were once normal people with their own lives and loves, but now they are trapped in this undead state. It's a tragic fate for them.
Through the atmosphere. The dark and spooky setting of the island, with its old mansions and foggy landscapes, sets a melancholic mood that implies sadness.
One idea could be that the gang discovers the zombies are actually victims of a mad scientist's experiment gone wrong. They have to find a way to reverse the process.
In a fanfiction crossover, Ghost Rider could end up in the Mystery Machine by accident. His flaming skull would surely freak out the gang. However, he might need their help to track down a villain who has escaped into the world that Scooby Doo and his friends inhabit. They could combine their skills, with Ghost Rider's supernatural powers and the gang's mystery - solving abilities.
The main characters are Scooby - Doo, a loveable yet cowardly Great Dane. Shaggy, Scooby's best friend, who is also easily scared. Fred, the leader of the gang who is always coming up with plans to catch the ghosts. Daphne, the damsel - in - distress type at times but also brave. And Velma, the smart one who often figures out the mystery behind the 'ghosts'.
The Scooby Doo Ghost Bear story usually involves the gang - Scooby, Shaggy, Fred, Daphne and Velma - stumbling upon a mystery related to the Ghost Bear. They might be at a spooky location like an old forest or an abandoned lodge where the Ghost Bear is said to haunt. Scooby and Shaggy are often scared out of their wits, running away and getting into comical situations while the others try to figure out the mystery behind the so - called Ghost Bear, which usually turns out to be a person in a costume trying to scare people away for some reason, like hiding a treasure or a secret in the area.
Scooby-Doo was indeed a comic first. The comic laid the foundation for its later success in TV shows and movies. It introduced the beloved characters and their adventures.