There could be a plot where Blair and Soul get transported to a different dimension. They have to find a way back home while adapting to the new and strange environment. Along the way, they meet new characters and form unexpected alliances.
One idea could be that Chuck Blair is using the limo for a very important business deal. He's in the back of the limo, nervously rehearsing his pitch while the city passes by outside. The limo could be a symbol of his status and power in this story.
Well, a plot could revolve around Blair being pregnant and deciding to focus on herself and her unborn child instead of getting caught up in the usual power plays. She could start to re - evaluate her relationships, like with Serena, and they could either grow closer as Serena supports her through the pregnancy or have some conflicts as their lives start to take different paths.
Another plot could be about them starting a family. The difficulties of pregnancy, raising children, and how they balance their busy lives with their new family responsibilities. There could be drama with in - laws and different parenting styles, but in the end, their love for each other and their family prevails.
In the fanfic, the ocean soul could give Percy the ability to communicate with long - lost sea creatures that hold ancient secrets. These secrets could be related to the origin of the gods or a powerful weapon. Percy has to earn the trust of these creatures and use the knowledge they share to prevent a great catastrophe that looms over both the mortal and immortal worlds.
One idea could be that Ichigo and Maka meet in a dimension that is a blend of their two worlds. They initially mistake each other for enemies but then realize they have a common goal of fighting against a new type of evil that is emerging due to the merging of their universes. Another plot could involve the Soul Reapers and the Meisters exchanging their powers for a short time to better understand each other's fighting styles and learn new techniques. A third plot idea is that the Hollows in Bleach start to target the souls in the Soul Eater world, and the characters from both series must team up to stop this invasion.
One interesting story could be about their adventures in a magical realm. Maybe they discover a hidden power together and have to use it to save their world.
One idea could be exploring the backstories of the lesser - known characters in the Soul Eater world. For example, the story of how some of the minor meisters and weapons got to the Death City. Another idea is a 'what - if' scenario, like what if Maka and Soul never became partners? You could also create a fanfic where the characters have to face a new type of enemy that is not related to kishin eggs but something completely different, like an alien invasion of the Death City.
Well, a plot could revolve around Naruto using soul magic to bring back the souls of those who were wrongly killed in the ninja wars. This would not only show his power but also his compassion. He might also use it to explore the afterlife and gain new jutsu or knowledge from there. And he could use soul magic to bind the souls of his friends together in a time of great crisis, creating a super - powerful united front.
Another plot could be that the reader is an outsider to the world of Soul Eater, perhaps from a different dimension. Soul accidentally discovers the reader and at first is suspicious. But as he gets to know the reader, he realizes that they are kind - hearted. They then have to deal with the challenges of the reader adapting to the Soul Eater world while also falling for each other.
One idea could be an OC who is a weapon with a unique transformation ability, like turning into a musical instrument for a really different combat style. Another idea is an OC from a far - off land, bringing new cultures and fighting techniques to the world of Soul Eater. Maybe an OC who is a miester with a special power to communicate with the souls of inanimate objects and use them in battles.