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.
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.
If Luffy kills a Celestial Dragon in fanfiction, it would likely cause a huge uproar in the One Piece world. The World Government would surely hunt him down with even more intensity. His bounty would skyrocket, and his friends and crew might be in more danger than ever as they would be associated with him.
After Luffy kills a Celestial Dragon in fanfiction, the story might see the emergence of new allies for the Straw Hat Pirates. There are likely many characters in the One Piece world who secretly despise the Celestial Dragons and would be inspired by Luffy's bold move. These new allies could bring new skills and resources to the crew. Also, the World Government might start to show its cracks as internal disputes could arise over how to handle Luffy. Some might want to go all - out to destroy him, while others might see the potential for a change in the current power structure.
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.
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.
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 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.
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.
First, study Akainu's character in the original work. Notice his personality traits like his strict sense of justice and his no - nonsense attitude. Then, think of a unique scenario for him, such as a time - travel adventure or an encounter with a powerful new enemy. Develop a plot around this, and don't forget to include his characteristic actions and dialogue.