A plot could involve the Volturi from Twilight coming to the Addams family's town. The Addams family, not ones to be intimidated, stand up to them. Gomez and Morticia show the Volturi that their family has its own set of rules and powers that are not to be trifled with.
One idea could be a time - travel plot where a member of the Addams family goes back in time to meet their ancestors. Another could be a story where they adopt a new and very strange creature into the family. Maybe a story about the Addams family hosting a very unusual party and inviting all their odd friends from different dimensions.
One idea could be a story where the Addams family moves to Forks. Wednesday Addams could befriend Bella, and they end up getting into all sorts of strange adventures together. Maybe Wednesday helps Bella deal with the vampires and werewolves in her own unique, macabre way.
One idea could be that the Addams Family, being the strange and macabre family they are, somehow get involved in the vampire - hunting activities of the Hellsing Organization. Maybe they see the vampires as kindred spirits in a way, but also recognize the danger they pose. Another could be a situation where a member of the Addams Family becomes a target of the vampires in the Hellsing universe, and the Hellsing crew has to work with the family to protect them.
One idea could be that a college student from the Addams family decides to study a very unusual major like 'The Art of Torture Through Music'. They could create chaos in the music department with their dark and spooky compositions. Another plot could involve an Addams family member falling in love with a 'normal' college student and trying to introduce them to the family's strange ways. Maybe they take their love interest to a family gathering where the usual Addams family antics like summoning the dead for a party game are on full display.
One popular plot idea could be a new adventure for the Addams family in a modern setting. Maybe they have to deal with a new neighbor who is initially scared of them but then learns to accept their unique ways. Another could be a family member getting into trouble at school or work because of their Addams - like behavior and the rest of the family coming to their rescue.
One idea could be a crossover with the Harry Potter universe. The Addams family could visit Hogwarts. Gomez could be fascinated by the magic spells and try to learn some dark arts in his own Addams - like way. Morticia might be intrigued by the Forbidden Forest and its strange creatures. Wednesday could make friends with the more outcast students at Hogwarts, like Luna Lovegood. They would bring their unique Addams family charm and macabre sense of humor to the magical world.
One interesting plot idea could be exploring how different characters adapt to the post - apocalyptic world in new and unexpected ways. For example, a character who was once a timid office worker becomes a fearless scavenger.
One idea could be that Xavier uses his art to try and understand Wednesday's dark and complex mind. He might create paintings that seem to predict events in her life, which both intrigues and annoys her. Another plot could involve them teaming up to solve a mystery in their school that involves both the normie and outcast worlds. For example, a series of strange disappearances that seem to be related to an ancient curse.
A plot could involve a new vampire in the Twilight universe who is ashamed of their transformation and uses a mask to try and fit into human society again. They struggle with their new instincts while trying to keep their identity a secret. Along the way, they meet other characters from the Twilight series and their story unfolds in a way that challenges the norms of the original story.
One idea could be a new vampire character being reborn in the Twilight universe with a special power, like the ability to control the weather. This would create a whole new dynamic as they interact with the Cullens and other vampires.