Maybe Buttercup has a secret admirer who turns out to be a reformed villain. Their love story could be about her learning to trust him and seeing the good in him despite his past deeds. This would involve a lot of character growth for both of them.
One plot idea could be a story where a character from PPGZ and one from RRBZ accidentally switch powers. This creates chaos as they struggle to adapt to the new abilities while also dealing with their growing, unexpected feelings for each other. Another could be a time - travel plot where a character goes back in time and tries to prevent a bad love event from happening between the two groups, but in the process, falls in love in a different way.
A plot about a new villain emerging who has the power to manipulate emotions. The PPGZ would have to not only fight this villain physically but also figure out how to protect the town's emotions. They could start having internal struggles as their own emotions are toyed with, leading to some really interesting character development.
One idea could be to explore the darker side of the PPGZ characters' powers. For example, Blossom's leadership could turn into a controlling dictatorship within the group. Another could be a scenario where the villains manage to corrupt the girls, making them fight against the very people they once protected. Maybe a new, extremely powerful villain emerges who uses mind - control on the PPGZ, leading them to do his bidding in a very dark and twisted way.
The plot might involve a power struggle too. Since the PPGZ have powers and the vampire in the RRBZ has his own abilities. Their love could be a way to bridge the gap between their two different worlds. For example, the vampire's immortality could be a factor that scares the PPGZ girl at first, but then she realizes it means they could have an eternity together.
Maybe in the fanfiction, there is an evil force threatening the mermaid world. The PPGZ and RRBZ, as mermaids and mermen, must put aside their differences and form an alliance. They could start by exploring different parts of the ocean to gather magical items that can be used to defeat the evil. The PPGZ's powers might be more about protection and healing in their mermaid forms, while the RRBZ could have powers related to stealth and finding secrets. This combination of powers would be crucial in their fight against the dark force.
One idea could be that Dracula falls in love with a modern - day vampire hunter. At first, they are enemies, but as they get to know each other, they can't resist the attraction. Another could be Dracula falling for a human who has a special power that makes her immune to his vampire charm at first, but he is drawn to her uniqueness.
One idea could be that Kabuto, a rather reserved character, falls in love with a new shinobi in the village. They meet during a training session where she shows extraordinary skills, and he's immediately intrigued. As they start to work together on missions, their relationship slowly blossoms. They face challenges like disapproval from some of the traditional shinobi elders who don't think Kabuto should be involved with someone new to the village. But their love overcomes all these obstacles.
One idea could be a love story between Thranduil and a mortal from a neighboring village. The mortal stumbles into the forest realm by accident and catches Thranduil's eye. Their love could be a forbidden one due to the differences in their natures and life spans. Another plot could involve Thranduil falling in love with a fellow elf from a different clan, and they must overcome the political tensions between their two groups to be together. Or perhaps a love story where Thranduil meets someone who has the power to heal the wounds of his past, and through their love, he is able to open up and move forward.
One plot idea could be that Sheamus, a tough wrestler, falls in love with a shy librarian. He accidentally bumps into her at a local coffee shop near the library. At first, she's intimidated by his large and rough - looking exterior. But as they start to talk, she realizes he has a soft heart. They begin to secretly meet up, sharing their love for books and stories from his wrestling career.
One idea could be that Hercules falls in love with a mortal who is a healer. She helps him when he's injured during one of his quests, and their love blossoms as he discovers her kind heart and selfless nature.