One common theme could be the clash of different powers. Naruto has his ninja abilities and Toa Dragonaut has its own unique powers, so that contrast and how they interact might be a theme.
I'm not sure of specific 'naruto x toa dragonaut fanfic' off the top of my head. But you can try searching on fanfic websites like FanFiction.net or Archive of Our Own. They usually have a wide range of fan - made stories.
A frequent theme is 'Time - Travel'. In these fanfics, a character, often Naruto, travels back in time and tries to change the past. This allows for a whole new set of adventures and interactions. Another common theme is 'The Ninja World's Politics'. Fanfic writers explore how the different hidden villages interact, form alliances, and compete for power in more detail than in the original series.
One major theme is the struggle for power. In 'hotaru naruto fanfic', Hotaru could be striving to become stronger, either to protect her loved ones or to prove herself. Also, the theme of loyalty is quite prevalent. She might have to choose between different groups or individuals and show her loyalty in various situations. For instance, she could be torn between her loyalty to her village and a new friend from another place. This creates interesting storylines.
One common theme is adventure. Since Naruto is always up for an adventure and Shion's powers can add an interesting element to their quests. For instance, they might go on a journey to stop a new evil force using Shion's prophetic abilities and Naruto's combat skills.
One common theme is the clash of different worlds. Since Naruto is from a ninja - based world and Kirito from a virtual - world - based story, the fanfics often explore how these two different settings interact.
One common theme is power acquisition. For example, a character getting the power of airbending and how they learn to control it. Another is the clash of cultures. Since Naruto has its own unique ninja culture and airbending comes from the Avatar world, there can be a lot of interesting interactions between the two. And sometimes, friendship is a big theme too, like how characters from both worlds form bonds while dealing with the new concept of airbending.
A third common theme is the chaos that Deadpool brings into Naruto's world. Deadpool is unpredictable and often causes mayhem in the usually orderly (in its own way) ninja world. This upheaval and how the Naruto characters deal with it is a major theme in many of these fanfics. Sometimes it's played for laughs, other times it's used to explore deeper concepts about order and chaos.
One common theme is isolation. Since Naruto is exiled, he is often alone, which is a central aspect of these fanfics. Another theme is self - growth. Through his exile, he has to learn to become stronger on his own.
One common theme is the integration of oriental aesthetics. For example, the use of oriental architecture in the settings, like traditional Japanese houses or Chinese - style pagodas in the shinobi villages. Another theme is the exploration of oriental values, such as honor and loyalty, and how they are expressed in the Naruto - like world.
One of the main themes is the bond between master and student. We see this in the original Naruto series, and in fanfics, it gets explored further. For example, how Naruto's bond with Jiraiya affects his growth as a ninja. Also, the theme of redemption through bonds can be found. A character might be redeemed through their connection with Naruto or other characters.