One idea could be to cross two different empires from different fictional universes, like the Galactic Empire from Star Wars and the Imperium of Man from Warhammer 40,000. You could explore how their military strategies and technologies interact. Maybe the Stormtroopers of the Galactic Empire meet the Space Marines of the Imperium. Another idea is to cross an ancient historical empire, such as the Roman Empire, with a modern - day fictional empire. This could lead to a story about cultural clashes and the adaptation of old - world values in a new setting.
How about a crossover with a post - apocalyptic world? Survivors from a desolate future find a way to the Roman Empire time. They could introduce advanced technology concepts that are primitive by their standards but seem like magic to the Romans. And they might also learn about the Roman society's strong values and governance systems which could be used to rebuild their own world.
Well, a great plot for a Naruto and Empire crossover fanfiction could be that the Nine - Tailed Fox within Naruto has some connection to a powerful and ancient beast in the Empire's lore. As Naruto tries to control his power, he discovers this link and has to work with the Empire's scholars and warriors to either tame the beast again or use its power for good. For example, if the Empire is under threat from a dark magic - using enemy, Naruto's unique chakra and the power of the beast could be the key to victory.
A third idea could be a crossover with a dystopian empire. The shinobi would face a much harsher and more controlling regime. This could lead to some really intense storylines as they try to either overthrow the regime or find a way to co - exist within it.
One idea could be a power struggle within the empire. Maybe a young noble rises to challenge the established ruling class. Another could be an exploration of the empire's relationship with a mysterious alien race. It could lead to a story of cooperation or conflict.
Character interactions are a big draw. Picture Naruto himself interacting with an emperor or empress from the other empire. Their different values and goals would surely lead to some intense and thought - provoking dialogues, and perhaps even a change in Naruto's view of leadership.
One interesting idea could be a crossover with "Moana". Elsa's ice powers and Moana's connection to the ocean could create a really cool dynamic. Maybe Elsa accidentally freezes part of Moana's ocean and they have to work together to fix it. Another could be with "Tangled". Rapunzel's long hair and her adventurous spirit combined with Elsa and Anna's journey in Frozen 2 would be exciting. Rapunzel could use her hair to help them climb mountains or cross chasms. A third idea is a crossover with "Beauty and the Beast". Belle's love for books and knowledge could help Elsa understand more about her powers and the history of magic in the Frozen world.
One idea could be to have the RWBY characters time - travel to the German Empire era. They could interact with the historical figures and get involved in the political and social situations of that time. For example, Ruby could meet with the military leaders and learn about their strategies, while Weiss might be intrigued by the upper - class society and their etiquettes.
One idea could be exploring the backstories of the secondary characters more in - depth. For example, what was the life of the mechanic before joining the Atlantis expedition? Another could be a story where the Atlanteans start to rebuild their civilization above ground, facing new challenges. Maybe a third idea could be a time - travel fanfic where modern characters go back to the prime of Atlantis and see how their technology and culture were at their peak.
One idea could be exploring the rise of a new, unexpected power within the Dragon Age empire. Maybe a group of mages and templars form an alliance to combat a common threat that the empire has ignored. This could lead to a lot of political intrigue and power struggles.
One idea could be a crossover where Master Chief from Halo ends up in the Star Wars universe and has to team up with the Rebel Alliance against the Empire. He could introduce his advanced combat skills and technology to the Rebels.