One interesting fanfiction could be about a crossover mission where the Avengers and Agents of Shield have to work together to stop a powerful new villain. Maybe the villain has the ability to manipulate time, and they have to race against the clock to prevent the villain from changing key historical events that would alter the present world. This would bring in elements of both teams' unique skills and resources.
One interesting Agents of Shield fanfiction could be a story where Fitz and Simmons face an alternate dimension threat that was never shown in the show. It could explore their relationship further under extreme circumstances.
Captain America is often very popular. His strong moral code and leadership qualities make him a great character to write about in fanfiction. In the context of both Avengers and Agents of Shield, he can be shown leading joint missions or mentoring new recruits. Another popular one is Black Widow. Her mysterious past and combat skills give a lot of room for creative storytelling, like exploring her time before she joined the Avengers or her interactions with Agents of Shield.
One interesting story could be about how the Avengers react to a particular mission in Agents of Shield that goes wrong. Maybe they step in to help and there are some great character interactions between the two groups.
Another great storyline could be about the Agents of Shield having to deal with the aftermath of an Avengers - level battle. They might be in charge of cleaning up, helping the survivors, and trying to figure out how to prevent such destruction in the future. This could show a different side of the Agents of Shield, as they are often in the background but play a crucial role in the overall Marvel universe.
In Naruto and Agents of Shield fanfiction, a cool crossover would be the training sessions. The Shield agents could learn some ninja techniques from Naruto and his friends. They could teach the ninjas about modern combat and espionage in return. Also, the idea of the tailed beasts in Naruto and how Shield might deal with such powerful entities is fascinating. They might try to study them or find a way to control them. And think about the character interactions. The ninjas' straightforward and honor - based personalities compared to the sometimes more morally ambiguous Shield agents could lead to some great character development moments in the fanfiction.
Another storyline might be a time - travel plot where the agents go back in time to prevent a major event that would have led to the downfall of the Avengers. They could encounter younger versions of the heroes and change the course of history. This would involve a lot of character development and exploring different timelines.
One interesting crossover could be the S.H.I.E.L.D. agents trying to understand and work with the ninja world of Naruto. For example, Coulson might be intrigued by the unique abilities of ninjas like Naruto's shadow clones. He could see potential in using some of their techniques for S.H.I.E.L.D. operations. Another aspect could be S.H.I.E.L.D. agents trying to adapt to the chakra system. Maybe Fitz - Simmons could study it and come up with some wild theories about how it relates to the science they know.
In some fanfiction, there could be crossovers with other Marvel properties. For instance, the Agents of Shield team could meet the X - Men. This would create a whole new set of dynamics and story possibilities. They might have to work together to stop a mutant - hating villain who is also after SHIELD secrets. Another idea could be a story where they encounter Doctor Strange and have to deal with a magical threat that they are completely unprepared for.
One interesting storyline could be a crossover where Agents of Shield agents have to team up with the Avengers to stop a powerful alien threat that neither group could handle alone. This would involve a lot of character interactions, like Coulson trying to give orders to Iron Man or Natasha Romanoff teaching some of the Shield agents her spy skills.
A great fanfic idea could be about an old enemy from the Agents of Shield's past coming back and the Avengers being brought in to help. It could involve a lot of mystery, action, and the building of new relationships between the two groups.