The theme of adventure is very prominent. The characters usually embark on some grand quest or face a big threat together. It's about their journey through this new, combined world. Also, there can be a theme of self - discovery. As the characters interact with new people, they learn more about themselves and their own capabilities. For example, a character might discover a new side to their power when working with someone from another story.
I've read 'Mystical Alliances in the Big Four Crossover'. This one is really detailed. It delves deep into the backstories of the characters from the big four and uses that to build a complex and fascinating crossover world. The author has a great way of bringing out the unique abilities of each character and making them work together in unexpected ways. There are many plot twists and turns that make it a very enjoyable read.
The 'big four' could refer to four main characters, perhaps from different stories or universes that are grouped together for some reason in the context of watching 'Tangled' fanfiction. For example, it might be four popular Disney characters who are fans of 'Tangled' in a fan - created scenario.
Perhaps there could be a scenario where the Fantastic Four are somehow transported to the Naruto world. They'd be like strange beings with their unique powers. The Leaf Village might initially be wary of them, but then they realize they can help in a fight against a common enemy, like a powerful rogue ninja who has an interest in the Four's technology or powers.
Solid Snake is an obvious choice. Since they are from the same general franchise, their encounter could be filled with a lot of drama and action. They could have different views on how to handle certain situations, which would create great story tension.
There's no definitive answer. On one hand, if they enjoy the original HTTYD stories, fanfiction could be appealing as it can provide unique takes on the world and characters. Fanfiction often delves deeper into relationships and backstories. But on the other hand, they might not be into the idea of reading non - official works and prefer to stick to the original content created by the official creators.
One idea could be a crossover with the X - Men. The Fantastic Four could team up with the X - Men to face a common threat like an alien invasion. Their combined powers would make for some epic battles and interesting character interactions.
They might watch 'Tangled' fanfiction for entertainment. Fanfiction often takes the original story in new and exciting directions, and they could be interested in seeing different interpretations of the 'Tangled' world.
Finding good fanfiction for this combination might be a bit difficult. First, consider the core themes of both series. DxD often involves themes of the supernatural, while Naruto is about friendship, growth, and ninja battles. A good fanfiction could play on these differences. For example, Naruto characters could be introduced to the concept of devils in DxD and have to form new alliances or face new enemies. You might also want to check out some fan communities dedicated to either DxD or Naruto for any hidden gems in terms of crossover fanfics.