There are. I've come across some Naruto summons Godzilla fanfics where the plot is quite engaging. In one, Godzilla is summoned not by Naruto alone but by a combined effort of Naruto and Sasuke. This creates an interesting power struggle as they both have different ideas on how to use Godzilla in the fight against the Akatsuki. The fanfic also delves into how the other ninja clans react to this new and extremely powerful summon. It's a fresh take on the Naruto universe and adds a whole new level of epicness to the story.
Sure. There are a few out there. You can usually find them on fanfic platforms. Some focus on the chaos that ensues when Godzilla is summoned in the Hidden Leaf Village. Imagine all the destruction just from Godzilla's footsteps! And then there are the reactions of the villagers, from fear to awe. The fanfics often explore how Naruto interacts with Godzilla, whether it's through some sort of chakra bond or just pure willpower to keep the giant monster in check.
Well, first off, there would be a lot of destruction. Godzilla is huge and his attacks are powerful. The landscape would be changed completely. For example, if he was summoned in the middle of a battle in the Naruto world, he could easily take out large groups of enemies just by stomping around. Also, Naruto would have to deal with the fact that Godzilla is not an ordinary summon. He might not be as easily controllable as other summons. Naruto would have to find a way to communicate with Godzilla, maybe through his chakra or some other means.
One idea could be that Naruto is transported to the Godzilla universe. He could use his ninja skills to try and communicate with Godzilla or other kaiju. Maybe he'd attempt to use his shadow clone jutsu to confuse the monsters during a battle.
In this fanfic idea, when Minato summons Future Naruto, it could also be for emotional reasons. Minato missed out on seeing Naruto grow up. By summoning Future Naruto, he gets to see the strong and capable man his son has become. Future Naruto can then tell Minato about his life, his friends, and all the adventures he's had, filling Minato with pride.
In this fanfic idea, Naruto summoning Shinigami captains could be really interesting. Maybe he could summon them to help in a battle against a powerful enemy like Kaguya. The Shinigami captains' unique abilities like kido and zanpakuto skills could turn the tide of the fight. Naruto's own chakra reserves and jutsu combined with their powers would create a very different kind of story dynamic.
One good Godzilla fanfic is 'Godzilla: King of the Monsters - The Awakening'. It delves into the backstory of Godzilla and how he became the iconic monster we know. It has great character development for not only Godzilla but also the humans who interact with him.
The Academy of Divine Pet Care's summoning of Godzilla was an oriental fantasy novel. It told the story of a world where demon beasts were rampant, and animal controllers became the profession to protect humans. The protagonist, Yun Chen, obtained a Divine Pet Academy on Summoning Day and successfully summoned Godzilla, the giant beast. However, this was only a part of the functions of the college. Every animal taming instructor could have a mysterious lottery, and every animal taming apprentice could also gain energy value from the college. The latest chapter of this novel was Chapter 530, A New Journey (End).
A Naruto and Godzilla fanfic could work by finding a common ground for their powers. For example, Naruto's chakra can be compared to the energy that Godzilla emits. They could either be in conflict because of different uses of this energy or they could work together to harness it for a greater good.
The plot could be that Raven is in a dire situation in her world. She discovers an ancient spell that might be able to bring a powerful ally to her side. She decides to use it to summon Naruto. Once Naruto arrives, they face a powerful enemy that is threatening Raven's world. They combine their powers, Naruto's Rasengan and Raven's dark magic, to defeat the enemy.
A possible plot could be that there is a disturbance in the balance of the Naruto world. The sages believe that only a being from another realm can help. Naruto is chosen to perform the summoning. He summons Mordred, and at first, they don't get along because of their different backgrounds. But as they learn more about each other and the true nature of the threat, they form an alliance. Mordred teaches Naruto some new combat techniques, and Naruto shows Mordred the value of friendship and loyalty in his world. Eventually, they defeat the enemy and Mordred may or may not decide to stay in the Naruto world depending on how their relationship has developed.
One challenge is the power balance. Hollows can be extremely powerful in the Bleach universe, and Naruto has his own set of strong abilities. Combining them in a believable way is tough. Another is the lore. Naruto has its own deep lore, and so does Bleach. Keeping both consistent while merging them is difficult. Also, the character interactions need to be well - thought - out. How will Naruto communicate with the Hollows? What will his friends think of these strange summons?