Yes, there might be. The Naruto and One Piece fandoms are both large, and it's not uncommon for fans to create crossovers or fanfictions where characters from one series admire those from another. You can try searching on popular fanfiction websites like FanFiction.net or Archive of Our Own.
Well, he might become more protective. Just like Whitebeard who was extremely protective of his crew, Naruto could start showing that same level of protectiveness towards his friends and the village. He might be more willing to use his power to shield them from any harm.
The plot could involve Naruto coming across knowledge about Whitebeard's adventures in some mysterious way. This knowledge could inspire Naruto to be more fearless in his battles and more protective of his comrades, just like how Whitebeard was with his crew.
The unique combination of two very different universes. Naruto's ninja world and Whitebeard's pirate world in One Piece are quite distinct. So, when Naruto is a Whitebeard fan in a fanfic, it brings in a new dynamic. It could be the clash of values like Naruto's loyalty to his village vs Whitebeard's loyalty to his crew, or the different power systems that interact in interesting ways.
Yes, there are quite a few. You can start by looking on some popular fanfic platforms like FanFiction.net or Archive of Our Own. Some stories might explore Naruto being inspired by Whitebeard's leadership and sense of family in the One Piece world and how he could incorporate those traits into his own ninja world.
His relationship with Sasuke would be very different. Sasuke might see Naruto as more of a rival or a threat now that he has Whitebeard's power and influence. Naruto, on the other hand, would probably try to get Sasuke to understand his new purpose of bringing unity. His friends like Sakura and Kakashi would also be a bit in awe at first, but then they would support him as he tries to use his new powers for good.
One idea could be Naruto having Whitebeard's sense of honor and leadership in the ninja world. He might gather a group of ninjas similar to how Whitebeard had his crew, and they fight for justice and protect the weak. Another plot could be Naruto having to deal with Whitebeard's old enemies reincarnated as well, leading to epic battles.
Well, it's really hard to say. Naruto is from a world of ninjas with chakra and all sorts of unique abilities. His ability to summon toads and use shadow clones gives him an edge in numbers and strategic options. Whitebeard has his quake - quake fruit which can cause massive destruction. However, Naruto's nine - tailed fox form would be a game - changer. It gives him incredible strength and speed. In a fanfiction, the writer could make it go either way depending on how they want to play with the powers and the plot, but if I had to choose, Naruto's versatility might just tip the scales in his favor.
One epic moment could be when Naruto first enters his nine - tailed fox form. The chakra surge would be huge, and the area around them would be filled with a menacing red glow. Whitebeard would have to brace himself as Naruto lunges forward with enhanced speed and strength. Another moment could be when Whitebeard uses his quake - quake fruit to create a massive tsunami - like wave of destruction, and Naruto counters it with a huge rasenshuriken, the two powerful attacks colliding in a spectacular display of power.
Their relationship could develop through mutual respect. Luffy respects Whitebeard as a powerful and respected pirate, and Whitebeard respects Luffy's determination and potential. For example, they could start with a simple exchange of stories about their adventures at sea.