One possible fanfiction could be where Orochimaru somehow gets involved in the Teen Titans' world and meets Red X. Maybe Orochimaru is after some sort of powerful artifact that the Teen Titans are protecting. Red X, being the mysterious anti - hero, might initially see Orochimaru as a potential ally to get his hands on the artifact for his own gain. But as the story progresses, he realizes Orochimaru's true evil nature and teams up with the Teen Titans to stop him.
Well, the 'Teen Titans Go' origin story starts with these diverse characters. Robin, for instance, brought his skills learned from the Dark Knight. Starfire came from another planet with her own set of abilities like flight and energy blasts. Beast Boy, who was experimented on, can turn into any animal. Cyborg was created after an accident that fused him with technology. Raven, with her demonic heritage, has strong magic. They joined forces as Teen Titans, facing challenges like the Brotherhood of Evil and other baddies in their city.
Perhaps Danny is from a parallel dimension and has been searching for a way to get home. He crosses paths with the Teen Titans and Red X. They initially think he's a threat but soon realize he can be of great help. He starts to share his knowledge of different dimensions which could be useful in their fight against villains.
There are many great fanfictions about Robin and Starfire in Teen Titans Go. Some might focus on their first date, perhaps in a really cute scenario where Robin tries to plan the perfect evening for Starfire. He could take her to a special place in Jump City that has meaning for both of them, like the place where they first met as heroes.
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.
It could start with a strange energy rift that connects the Naruto and Teen Titans universes. Orochimaru, always seeking new powers and knowledge, senses this and decides to investigate. Red X, on the other hand, is in the middle of a heist in the Teen Titans' city when he is suddenly pulled into the rift along with Orochimaru. Naruto, who is training nearby in his own world, also gets caught up in the energy and is transported to the Teen Titans' world, setting the stage for their interactions.
One common theme is the exploration of their cultural differences. Starfire is an alien, and Robin is from Earth. Fanfictions often delve into how they understand and adapt to each other's cultures. Another theme is the growth of their relationship, from initial attraction to a deeper, more committed love.
Naruto could fit in by sharing his knowledge of the ninja world. This could include things like how to make different types of ninja tools or how to perform certain stealth techniques. In return, the Teen Titans could teach him about teamwork in a different way than he's used to in Konoha. His unique abilities like summoning animals could also be a huge asset when they are up against tough enemies.
One common theme is acceptance. The fanfics often deal with how the other characters accept the gay relationship within the Titans group. It shows the importance of friendship and support in such situations.
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.