A really interesting plot could be that Bella is in a world where mutants are not fully accepted, and being Logan's daughter makes her a target. She then decides to fight for mutant rights, inspired by her father. She could form a group of young mutants and lead them in a peaceful protest against the discrimination they face. Logan is initially hesitant but then supports her fully.
Perhaps a plot where Hermione is trying to find out more about her father, Logan. She travels to different places in the mutant universe, meeting various characters. Along the way, she discovers new spells and magical abilities that are influenced by her mutant heritage. She also has to deal with those in the wizarding world who are suspicious of her newfound connections.
They could start off with Bella being a bit scared of Logan because of his rough exterior. But as time passes, she realizes he has a soft heart. For example, Logan could teach Bella how to defend herself, and during those training sessions, their bond grows.
A possible plot could be that Bella's status as God's daughter gives her the ability to travel between different realms. She could visit heaven to seek advice from her divine father or explore other spiritual planes. When she comes back to the human world, she has new knowledge and powers. This could make her more confident and independent, which would change the dynamics of her relationships. For instance, she might not be as dependent on Edward for protection, and this could lead to some interesting developments in their love story.
A possible plot could be that Bella has a special talent, like being able to communicate with animals. Eric doesn't believe her at first and thinks she's just making things up. But as she proves it more and more, they both have to deal with the implications of this strange ability, and it brings them closer together as they figure out how to handle it.
A great plot could be that a new threat emerges that targets both magic - users and mutants. Harry and Logan are brought together by a mutual acquaintance who believes that their combined abilities are the key to stopping this threat. Along the way, they learn from each other's worlds, with Harry teaching Logan about magic spells for protection and Logan showing Harry some of his survival and combat techniques.
One plot idea could be that Skye kidnaps someone she believes has crucial information about her past. The victim could be a scientist who worked on a project related to Skye's origins. As she holds the person captive, she gradually realizes that she might be wrong and has to deal with the moral implications of her actions.
One plot idea could be that Princess and Logan are forced to team up to save Albion from a new, unseen threat. Maybe a dark magic has started to corrupt the land and they have to put aside their differences. They start off distrusting each other but as they face challenges together, they begin to understand each other's motives better.
One plot idea could be that Rogue and Logan discover their baby has a unique mutant ability that they need to protect from a group that wants to use it for evil. Another could be the baby getting lost in a dangerous mutant - friendly area and Rogue and Logan have to search for it while facing various challenges along the way. And a third idea might be that the baby is sick and they have to find a cure, which leads them to explore different parts of the mutant world they've never been to before.
One idea could be that Veronica and Logan are new parents and they struggle with the lack of sleep. They have to learn how to take care of the baby while also dealing with their own relationship issues. For example, Logan might be worried about providing enough for the family financially, and Veronica has to balance her career aspirations with motherhood.
Maybe in the fanfiction, there's a school competition where Zoey and Logan are on opposing teams at first. But then they realize that there's some cheating going on within the competition and they team up to expose the truth. Along the way, they discover that they have more in common than they thought, like their love for justice and fairness.