One idea could be a crossover with the Justice League. The Titans could team up with the League to fight a powerful, universe - threatening villain. For example, Darkseid could be the main antagonist. The different powers and personalities of the Titans and the League members would create a lot of interesting dynamics.
A crossover with the Young Justice team would also be cool. Since both groups are made up of young heroes, they could have a friendly competition at first, like a training exercise that gets out of hand and turns into a real battle against a common enemy, like the Injustice League's younger members.
One idea could be a crossover with the Justice League. The Teen Titans could team up with the big - league heroes to face a powerful, universe - threatening villain. For example, Darkseid could be the main antagonist, and the Titans' unique powers and youthful energy would add a fresh dynamic to the fight.
A fanfic could focus on Cindastar's backstory. Maybe she has a hidden past that is somehow connected to an ancient prophecy. As the story unfolds, the Teen Titans help her uncover the truth about her origin.
One idea could be creating an OC with a unique power like the ability to control time in small increments. This OC could be from a different dimension and end up joining the Teen Titans by accident. Their time - controlling power could cause all sorts of chaos and interesting plot twists as they learn to control it and use it for good.
Another plot idea could be a love triangle within the Titan world involving the bride. There might be a powerful Titan who is jealous of the relationship between the main Titan and the human bride, and this jealousy could lead to a series of events that put the relationship and the Titan society in jeopardy.
One idea could be that the two teams are forced to compete in a series of challenges by a mysterious villain. This would lead to some friendly rivalries and also force them to learn from each other's strengths. For example, the Teen Titans' experience with magic-based threats could help the Young Justice team, while Young Justice's strategic planning might be beneficial to the Titans.
One idea could be an OC with unique powers that disrupt the team's dynamics at first. For example, an OC who can manipulate time in small increments but doesn't have full control yet, causing accidental glitches during battles. Another could be an OC from a different dimension who has to learn the ways of the Teen Titans' world. Maybe they have a completely different set of values and powers based on their home dimension.
A really cool plot for a Beast Boy Titans North fanfic would be if there was a mystery in Titans North related to some ancient animal - themed artifacts. Beast Boy, with his connection to animals, gets drawn into the mystery. He could discover that these artifacts have the power to either enhance or disrupt his powers. Along the way, he also has to deal with his own insecurities about being different from the other Titans in North, as his powers are more nature - based compared to some of their high - tech or super - strength powers.
One idea for a Class of the Titans crossover fanfiction could be with the Percy Jackson series. You could have the demigods from Percy Jackson meet the heroes of Class of the Titans. Maybe they team up to fight a common enemy like a powerful Titan that has escaped from Tartarus. The different powers and personalities would make for an interesting dynamic.
You could do a crossover within different fable universes. For instance, take the moral - driven characters from Aesop's fables and put them in the world of Native American fables. The animals in Aesop's fables might learn new values from the Native American fable characters. Also, consider mixing fables from different cultures, like Asian fables and European fables, in a fanfic.
Maybe a crossover with a fantasy world where the Darkness entities interact with magical creatures. For example, they could form alliances or rivalries with elves or wizards, which would lead to a whole new set of adventures and conflicts.