Another idea is that there is a multiverse - spanning threat that only Bella and Deadpool can stop together. Bella brings her knowledge of the Twilight world's magic and Deadpool his combat skills and unbreakable will. Along the way, they constantly bicker and joke, with Deadpool trying to get Bella to loosen up and be more like him in terms of humor.
One plot idea could be that Bella, after some strange supernatural event, ends up in Deadpool's world. Deadpool decides to 'train' her in his own unorthodox way to survive in his chaotic universe. They could start off as reluctant partners but gradually become friends as they face various villains together.
Perhaps a plot where Deadpool is hired (in his own strange way) to protect Bella from some unknown danger in her world. He doesn't understand the whole vampire - werewolf dynamic at first but quickly adapts. As he protects her, they form an unlikely bond and end up changing each other's perspectives on life and heroism.
A great plot could be that they are both invited to a superhero convention (in - universe). There, they get into all sorts of comical situations, like Deadpool trying to sell autographed pictures of himself and Spider - Man having to deal with over - enthusiastic fans. Along the way, they also discover a plot by a villain to disrupt the convention.
One plot idea could be that Spiderman and Deadpool are forced to team up on a mission in a strange, other - dimensional city. During their time there, they have to rely on each other in ways they didn't expect, leading to a deeper understanding and a unique friendship. Another could be a time - travel plot where they go back in time and have to deal with versions of themselves from different points in their history. Maybe they accidentally change something in the past that affects their present relationship in unexpected ways.
A third plot idea could be that Mike and Bella are part of a mystery club in their town. A series of strange events start to happen around town, and they team up to solve the mystery. They interview different townspeople, search for clues in old buildings, and slowly piece together what's going on. As they spend more time together on this adventure, they form a deep bond based on their mutual curiosity and problem - solving skills, without any romantic or sexual undertones.
One plot idea could be Clawdeen starting a fashion line at Monster High. She could face challenges like getting enough materials, dealing with jealous classmates, and finding models. Another idea is that she discovers a hidden part of Monster High that has a connection to her family's past. She then has to explore it while also keeping up with her schoolwork and social life.
One plot idea could be that Kiba and Shino team up for a mission in a new, uncharted forest. They have to rely on each other's unique skills - Kiba's sense of smell with Akamaru and Shino's insect control - to overcome various obstacles like dangerous wild animals and tricky terrain.
One plot idea could be a story where Kagome discovers a hidden message or prophecy left by Inutaisho. She then embarks on a journey to decipher it, which leads her to learn more about Inutaisho's past and his true intentions. Along the way, she meets various characters who knew Inutaisho and gains a deeper understanding of him.
One idea could be that Bella discovers a new power that she and Edward have to figure out how to control together. It adds a new layer to their relationship and the overall Twilight -esque world they inhabit.
A possible plot could be that there is a threat to the vampire community that only Bella and Carlisle, with their combined skills and knowledge, can solve. As they work together, they start to see each other in a different light. Carlisle might see Bella not just as a young vampire but as a strong and intelligent equal, and Bella could gain a deeper respect for Carlisle's wisdom and experience. During this time, their relationship could evolve in unexpected ways, like a deeper friendship that is on the verge of something more, but they are hesitant due to the age gap and their different roles in the vampire family.
Since 'lemon' fanfiction is not appropriate to discuss, let's consider other aspects. You could search for crossovers between the Twilight universe (where Bella is from) and the Deadpool universe that focus on how the different mythologies and powers would interact. Maybe a story about how Deadpool would react to the vampires and werewolves in Bella's world could be really interesting without any inappropriate content.
A really interesting plot would be if the Nine - Tailed Fox in Naruto had some sort of connection to an ancient and powerful spirit in the Avatar world. The Avatar and Naruto would have to figure out this connection and use it to either control or understand the power of the Nine - Tailed Fox better. This would involve a lot of exploration of both worlds' mythologies and powers, and also some great character interactions as Naruto and the Avatar learn from each other.