One idea could be that the 6teen characters are trapped in a shopping mall during a zombie apocalypse. They have to use the resources in the mall to survive while also avoiding the zombies. Another could be that one of the characters gets bitten but tries to hide it from the others for as long as possible.
Well, perhaps the group of 6teen characters find an abandoned laboratory where the zombie outbreak might have originated. They search for a cure while fending off zombies. And they could also discover that some of the zombies have retained a bit of their former selves and they try to communicate with them to find out more about the virus.
One idea could be exploring Naruto's growth during his teen years in a more in - depth way. For example, focusing on his training with new jutsus and how he overcomes challenges in his relationships with friends like Sasuke and Sakura.
One idea could be that the characters from Teen Wolf end up in the Fate universe and have to deal with the complex magic system there. For example, Scott could try to use his werewolf abilities to control the powerful magical forces in Fate. Another could be a love story where a character from Teen Wolf falls in love with a Fate character, like Stiles falling for a Fate mage. Maybe the Teen Wolf pack has to fight against a common enemy in the Fate world, something that combines the bestial nature of the werewolves with the magical threats of Fate.
One idea could be an OC with unique powers that disrupt the team's dynamics at first. For example, an OC who can manipulate time in small increments but doesn't have full control yet, causing accidental glitches during battles. Another could be an OC from a different dimension who has to learn the ways of the Teen Titans' world. Maybe they have a completely different set of values and powers based on their home dimension.
One idea could be a new banshee oc who discovers her powers during a full moon and has to deal with the chaos in Beacon Hills. She could befriend Scott and his pack and use her unique abilities to help them fight off new threats.
One idea could be that Gumball and his friends find a way to communicate with the zombies and try to co - exist. Maybe they discover that the zombies are not as mindless as they seem and have their own stories.
A fanfic could focus on Cindastar's backstory. Maybe she has a hidden past that is somehow connected to an ancient prophecy. As the story unfolds, the Teen Titans help her uncover the truth about her origin.
One idea could be creating an OC with a unique power like the ability to control time in small increments. This OC could be from a different dimension and end up joining the Teen Titans by accident. Their time - controlling power could cause all sorts of chaos and interesting plot twists as they learn to control it and use it for good.
One plot idea could be Draco struggling to balance his studies at Hogwarts while also being a teen parent. Maybe he has to deal with the judgment of his peers and professors. Another could be his journey in finding support from unexpected places, like a Muggleborn friend who understands the challenges of being a young parent more than he expected.
One idea could be that a zombie virus spreads in the Naruto world. Naruto and his friends have to not only fight the zombies but also figure out how the virus started. Maybe Orochimaru was experimenting with dark jutsu and it went wrong.
One idea could be that Bella, instead of becoming a vampire, is bitten by a zombie. She then has to struggle with her new zombie nature while still holding onto her humanity. For example, she might try to resist the urge to attack her human friends like Jacob and Charlie.