Well, a great plot idea for their fanfiction might be that Serena and Darien are put under a spell that makes them forget they love each other. As they interact in their daily lives as Sailor Moon and Tuxedo Mask, they start to develop new feelings all over again. Also, they could be on a mission to a far - off planet where they discover a new side of their relationship. Maybe they have to pretend to be married on this planet and in the process, their relationship deepens.
One interesting plot idea could be Serena and Darien getting lost in a magical realm together. They'd have to rely on each other's strengths, like Serena's optimism and Darien's calmness, to find their way back. Another could be a story where they swap powers for a day, leading to humorous and challenging situations as they adjust to the new abilities. And perhaps a plot where they go back in time to prevent an event that would have separated them in the future.
Their relationship can be developed by having them face challenges together. For example, they could face a powerful enemy that requires them to combine their powers in new ways. This would force them to communicate better and understand each other's strengths and weaknesses more deeply. Another way is to show their daily lives, like going on a date where things don't go as planned, but they still manage to have a great time and learn more about each other.
One idea could be a story where Serena discovers she's pregnant during a time of peace in the Sailor Moon universe. The other Sailor Guardians could rally around her, offering support and protection. Maybe there are new challenges that come with her pregnancy, like dealing with new enemies who target her unborn child.
One interesting plot idea could be a time - travel scenario where Sailor Moon goes back in time to prevent a major event that led to the rise of a powerful enemy. Another could be a crossover with another popular anime, like having Sailor Moon meet Naruto and they team up to fight a new threat.
A possible plot could be that Serena gets pregnant unexpectedly. This throws her life into chaos as she tries to keep it a secret from her enemies. She has to rely on her friends more than ever, and they create a secret hideout for her where she can rest and be protected during her pregnancy.
An interesting plot could be that Goku and Sailor Moon meet during a multiverse tournament where representatives from different anime universes are competing. They initially don't get along because of their different fighting styles and beliefs, but as the tournament progresses, they realize they can learn from each other. Together, they face off against a cheating opponent who is using unfair tactics to win. Through their combined efforts, they not only defeat the opponent but also learn to respect each other's worlds and ways of fighting.
Well, in Sailor Moon dark fanfiction, a cool plot could be the Sailor Guardians facing an enemy that can manipulate their worst fears. This would make them question their own abilities and loyalties. Also, a story where the power source of the Sailor Guardians is somehow tainted, turning their powers dark and making them struggle to control it. Or perhaps a plot where a new dark Sailor Guardian emerges, with powers equal to or greater than Sailor Moon's, causing chaos in the magical world.
One idea could be that the characters from RWBY end up in the Sailor Moon universe and have to learn the ways of the Sailor Scouts. For example, Ruby could be intrigued by Sailor Moon's transformation and try to adapt her Crescent Rose to work in that magical world.
One idea could be a story where a new Sailor Guardian emerges from a different dimension and has a unique power that can either help or hinder the fight against the Black Moon Clan. For example, she might be able to manipulate time in a different way than Sailor Pluto. Another plot could involve a member of the Black Moon Clan who has a change of heart and decides to secretly assist the Sailor Guardians. This would create a lot of internal conflict within the clan.
Well, perhaps Serena could get involved in a mystery regarding a rare and powerful Pokemon in Sun and Moon. She could team up with some local trainers to solve it. Maybe there's a hidden cave where this Pokemon is rumored to be, and along the way, she discovers new forms of Pokemon she's never seen before. This would add an element of adventure to the fanfiction.
One interesting plot could be Serena from 'Sailor Moon' getting transported to another universe in a crossover. She could meet characters from different shows and have to team up with them to defeat a common enemy. Maybe she meets a group of magical girls from a different series and they combine their powers in unique ways.