Well, it could be about Naruto having to deal with the strict and fiery nature of Akainu as his father. Maybe Naruto has to adapt to a more military - style upbringing while still holding onto his own ninja values.
One common theme is the clash of ideologies. Akainu has a very strict and uncompromising view of justice in his original story, while Naruto has a more forgiving and rehabilitative view. So when they interact in fanfiction, this clash often forms a central theme.
There could be a 'naruto akainu fanfiction' that focuses on a team - up between Naruto and Akainu. Maybe Naruto, with his belief in redemption, tries to change Akainu's extreme views while Akainu is initially resistant but gradually starts to see things from Naruto's perspective. This would create a lot of interesting character development and conflict.
One good Admiral Akainu fanfiction could be 'Akainu's Redemption'. It might explore his character in a new light, showing his journey towards a different perspective. Another could be 'Akainu in the New World' which could detail his adventures in uncharted territories. There's also the possibility of 'Akainu's Hidden Past' that delves into his backstory and what made him the person he is in the original story.
One possible plot could be that Akainu attacks the Straw Hat's new island, endangering Luffy's friends. Luffy, filled with rage, challenges Akainu. After an intense battle, Luffy discovers a new form of his Gear ability that allows him to withstand Akainu's magma and finally defeat him.
One idea could be a crossover with the 'One Piece' world where Akainu has to team up with pirates to fight a common, greater evil like an ancient sea monster. This would create a lot of tension as Akainu is known for his hatred towards pirates.
Considering Luffy's character development, he has always been against those who harm his friends and the innocent. Akainu has caused great harm, especially during the Marineford War. If Luffy continues to grow in strength, and if the story progresses in a way that pits them against each other again, there's a chance. But the Marines also have their own ways of protecting their top - ranked officers, so it's a complex situation.
Superman from the DC universe. Superman stands for truth, justice, and the American way, but his methods are often more lenient compared to Akainu. The two could have a philosophical debate about justice while also having to fight a common enemy.
It's hard to say if 'naruto son of fanfiction' is popular. Popularity in the fanfiction world can be measured in different ways. If it has a lot of views, comments, and positive feedback on fanfiction platforms, then it might be popular. But since we don't have any data on that, we can't really tell. It could be a hidden gem that only a few dedicated Naruto fans know about, or it could be relatively unknown compared to more mainstream Naruto fanfictions.