The plot could involve a search for an ancient artifact that has the power to disrupt both the JJBA world and the Warframe world. The characters from JJBA, with their unique stands, would have to work with the Warframe characters who have their own set of skills and powers. They would face challenges in understanding each other's powers and how to combine them effectively.
Well, it could be about the JoJo characters getting transported into the Warframe universe. They might team up with the Tenno to fight against common enemies like the Infested. For example, Jotaro could use Star Platinum's power along with a Warframe's abilities to take on hordes of foes.
Kakyoin and Loki Warframe would make a fascinating pair. Kakyoin is very intelligent and strategic with his Hierophant Green stand. Loki, on the other hand, is all about stealth and deception. They could combine their skills to infiltrate enemy bases in the crossover. Kakyoin could use Hierophant Green to scout ahead while Loki keeps them hidden from detection.
One possible plot could be that Gumball and his family somehow get transported to the JJBA universe. They might meet the Stardust Crusaders and initially be mistaken for stand users due to their zany and unique abilities. Gumball's shape - shifting ability could be seen as a stand - like power. They could then team up to fight a common enemy, like a new villain that threatens both their worlds.
One possible plot could be that the Tenno from Warframe are somehow transported to the Star Wars universe. They could team up with the Jedi to fight against the Sith and the Grineer, who have also found their way into this new universe. The Tenno's unique abilities, like their Warframe powers and weaponry, would be a great addition to the Star Wars battles.
The fanfic could be set in a post - war scenario. Nidus and Saryn are part of a group trying to rebuild the war - torn areas of the Origin System. Nidus is using his powers to purify and transform the infested areas into something more habitable, while Saryn is using her toxins to destroy any remaining harmful substances. At first, the other members of the group are a bit wary of their powers. But Nidus and Saryn prove their worth. They also start to develop a special connection as they work side by side, with Nidus being intrigued by Saryn's scientific approach to her powers and Saryn being fascinated by Nidus's biological mutations.
One idea could be that the Tenno from Warframe are sent to the RWBY universe due to a trans - dimensional rift. They team up with the RWBY characters to fight a new common enemy that is a fusion of the Grineer and Grimm. The Tenno can introduce their advanced technology and combat skills, while the RWBY characters show their unique Semblances and teamwork.
First, decide on the starting point. If you start in the JJBA world with Kira Yoshikage, you could have him accidentally open a portal to the Naruto world. His confusion and his instinct to keep his murderous habits hidden would drive the initial plot. He might try to blend in, but his different appearance and behavior would make it difficult. In the Naruto world, he could encounter Naruto and his friends who would sense something is off about him.
One idea could be a crossover with another popular anime like Naruto. For example, Jotaro could meet Naruto and they could have a battle of wills and powers. Naruto's positive attitude might clash with Jotaro's more stoic nature.
Well, you could focus on the character crossovers. Imagine Jotaro Kujo meeting Ichigo Kurosaki. Jotaro's cool and collected demeanor would contrast with Ichigo's more hot - headed nature. They could learn from each other's fighting styles. And then there's the possibility of Stand users having to adapt to the spiritual energy in the Bleach world and vice versa. This could lead to some really interesting power - up and training sequences for the characters involved.
One idea could be that Kira Yoshikage from JJBA somehow ends up in the Naruto world. Maybe his Stand ability could be misinterpreted as some kind of strange ninja jutsu. He might try to live his quiet life there, but his actions would surely draw the attention of the ninja. For example, if he starts using his Stand to kill people in the ninja villages, it would be like a new and unknown threat to the ninja, and they would have to figure out how to deal with it.
One idea could be the Persona characters getting sucked into the JJBA universe. For example, the Phantom Thieves could end up in Morioh and have to deal with Stand users while trying to find a way back home. They might team up with Josuke and his friends to fight a common enemy that's causing chaos in both their worlds in a strange way.