The cultural elements of the settings can also be combined. 'In the Heights' has a strong Latino culture, while 'Hamilton' is steeped in American colonial and revolutionary culture. There could be a celebration in the crossover where both cultures are showcased. Characters could learn about each other's traditions, like the characters from 'Hamilton' learning the significance of the Dominican Independence Day parade in 'In the Heights', and the 'In the Heights' characters learning about the Fourth of July celebrations in 'Hamilton'.
One interesting plot idea could be a character from 'In the Heights' getting transported to the world of 'Hamilton'. They could interact with the historical figures in 'Hamilton' in a modern and unique way. For example, Usnavi could meet Alexander Hamilton and they could exchange ideas about building a better future for their communities. Maybe Usnavi could introduce Hamilton to the concept of a tight - knit neighborhood like in 'In the Heights' and how it can be a force for positive change.
The colorful and magical world of Equestria from MLP could be juxtaposed with the spooky and mysterious Gravity Falls. You could have parts of Gravity Falls, like the Mystery Shack, appear in Equestria. Maybe the ponies think it's a new kind of magical building. Or, have the Gravity Falls forest start to show up in Equestria, with its strange creatures and anomalies.
The settings can be combined by having Naruto characters appear in Eorzea. For example, the Hidden Leaf Village could be magically transported to a corner of Eorzea. The lush forests of the village could contrast with the more varied terrains of Eorzea like the deserts and mountains. Another way is to have areas in Naruto, such as the Valley of the End, take on some of the magical properties of Final Fantasy 14. Maybe there are floating crystals or strange magical auras in the Valley of the End now.
Well, for starters, you can give the Battle Royale characters some of the abilities or traits from the Akira characters. For instance, make one of them have a bit of Tetsuo's instability and power - hunger. Or you could have an Akira character thrown into the Battle Royale situation and see how they use their psychic powers to survive. Maybe they use it to form alliances or to take out threats from a distance.
One way to combine the settings is to have a portal open between Westeros and Middle - earth. Maybe a powerful wizard in 'Lotr' accidentally creates a gateway while experimenting with magic. Through this portal, characters from both worlds can pass and interact. For example, Aragorn could enter Westeros and help in the fight against the White Walkers, or Tyrion Lannister could end up in Minas Tirith and use his wits to deal with the politics there.
The settings can be combined by having the hidden villages from Naruto be located in different parts of Spira. For example, Konoha could be in the middle of a forested area similar to Macalania Woods. The temples in Final Fantasy X - 2 could also serve as important locations in the Naruto - Final Fantasy X - 2 combined world. They could be places where chakra or magic is especially strong.
Maps can be used as a visual aid to enhance stories in educational settings. For example, when teaching history, a map can show the locations of important events mentioned in a story. This helps students better understand the geographical context and makes the story more vivid and memorable.
The settings could be combined by having a joint magical school project. The teachers from both Hogwarts and Halloweentown decide to have their students work together on a project that requires them to use the unique features of both settings. So, Hogwarts students might have to go to Halloweentown to study the growth of magical pumpkins, while Halloweentown students come to Hogwarts to learn about the history of magic in the wizarding world. This would give the opportunity for the detailed descriptions of both settings to be intertwined in the fanfic.
Well, you could have Hogwarts located near Forks. So, the students at Hogwarts might sometimes interact with the vampires and werewolves from Twilight. For instance, there could be a forbidden forest area that connects the two worlds in a way, and strange things start to happen when characters cross over.
The idea of being different and having to find one's place in the world is also present in both. A fanfiction could explore how Elsa, with her ice powers, and Hiccup, with his connection to dragons, both feel like outsiders in their own communities at first. They could come together and help each other realize that their differences are actually their strengths. This could involve them teaching their respective communities about acceptance and the value of being unique.