A cool fanfiction storyline could involve the Teen Titans being transported to an alternate version of Gotham where Batman is a villain. They have to figure out what went wrong and try to turn Batman back to the good side while also dealing with the chaos in this new Gotham.
One interesting storyline could be Nightwing joining the Teen Titans on a mission to stop a powerful new villain who has the ability to manipulate time. This would create a lot of chaos and force the team to think on their feet. Another could be Nightwing having to train a new and inexperienced member of the Teen Titans, leading to some comical and also heartwarming moments as they bond.
One interesting Teen Titans Batman fan fiction could be one where Batman has to train the Teen Titans in his unique combat and detective skills. Maybe in a story where Gotham is under a new threat that requires the combined efforts of the Titans and Batman's expertise.
One interesting storyline could be the Teen Titans protecting the child reader from a new supervillain in town. They might take the child under their wing, teaching them about courage and friendship along the way.
In a 'Teen Titans meets Batman' fanfiction, there could be an epic battle. Maybe the Teen Titans initially mistake Batman for a threat and they engage in a fight. Robin, being Batman's sidekick, might have to step in to clear the misunderstanding. Then, they could team up to face a common enemy like the Joker or Slade. It would be amazing to see how Batman's detective skills and the Teen Titans' unique powers combine to solve a mystery or save the day.
One idea could be a crossover where Batman Beyond teams up with the Teen Titans to face a new threat in Gotham. Maybe a powerful villain has emerged who is using advanced technology that only Batman Beyond can understand, and the Titans' unique powers are needed to combat the villain's minions.
Batman's origin in Teen Titans Go is somewhat of a comical take on the traditional origin. He witnessed the death of his parents in Crime Alley which drove him to fight crime. But in the Teen Titans Go version, it's presented with their signature humor.
Batman himself is often very popular. He brings his detective skills and brooding presence to the stories. Robin is also a favorite, especially since he has connections to both the Teen Titans and Batman. His growth and development in these fanfictions can be really engaging.
The interaction between Robin and Batman would be really interesting. Robin has his own identity with the Teen Titans now, and Batman is his former mentor. There would be a lot of unspoken history and emotions. Batman might be proud of how Robin has grown, but also a bit overprotective. And Robin would be eager to show Batman that he can handle himself without his constant guidance.
A cool Teen Titans Go fanfiction idea could be centered around a holiday. For example, during Christmas, a villain tries to steal all the presents in Jump City. The Teen Titans have to not only stop the villain but also make sure the city still has a great Christmas. Another idea is a fanfiction where Raven gets amnesia. The other Titans have to help her regain her memories while also protecting her from those who might take advantage of her in this vulnerable state. And then there could be a fanfiction where Beast Boy discovers a new animal form that he can't control at first, and the Titans have to help him master it.
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.