What could be the plot in 'naruto is aku fanfiction'?

It could be someone from the Naruto universe who doesn't like Naruto's newfound fascination with Aku. For example, Danzo might see Naruto's interest in Aku as a threat to the stability of the village and try to stop Naruto from further exploring Aku - related things. So, Danzo could be the main antagonist in this case.

One possible plot could be that Percy, through some strange magical or scientific accident, starts to transform into Aku. At first, he might be confused and scared as he feels his body and mind changing. His friends would be shocked and try to find a way to reverse the process. But as he becomes more like Aku, he begins to gain Aku's powers, which he has to learn to control while still trying to hold on to his own moral compass.

One idea could be a crossover where Aku accidentally opens a portal to the Naruto universe. Naruto, being the curious and brave ninja he is, decides to explore Aku's world. They could start off as enemies, but gradually come to understand each other's motives and end up teaming up against a greater evil that threatens both of their worlds.

Since Naruto has the Nine - Tails' chakra, which is a powerful and primal energy, and Aku has his own otherworldly and malevolent energy, they could combine these energies in a last - ditch effort to defeat an ultimate enemy. This combination could create a completely new form for Naruto, one that has the strength and ferocity of the Nine - Tails along with Aku's dark and mysterious powers. It would be a visually stunning and very powerful transformation that could turn the tide of a great battle.

The character of Aku could be developed in a 'pregnant Aku in Samurai Jack fanfiction' by exploring how he interacts with the world around him differently. He may become more reclusive as he doesn't want others to see his 'weak' state. Or he could become more aggressive in trying to protect his pregnancy, which would be a new aspect of his character. Also, his relationship with his own power might change. Maybe he has to find new ways to use his magic that don't harm the unborn, which would force him to grow and adapt in ways he hasn't before.

Aku could be a storyteller. Maybe it's a person's name.

It could be a character who wants to use Percy - turned - Aku for their own evil purposes. Maybe a dark wizard who thinks that Aku - Percy can be the ultimate weapon to take over the world. This wizard would try to manipulate Percy's new form and powers to do his bidding.

Well, a plot could revolve around Aku trying to keep his pregnancy a secret from Samurai Jack. He might be worried that Jack would use this new situation to his advantage. And then there could be a sub - plot about Aku having strange cravings that lead him to unexpected places in the world of the fanfiction, causing chaos in different ways.

I'm not sure who Aku specifically is. Aku could be a person with a great imagination who tells all kinds of stories, like adventure stories, fairy tales or even true - life stories.

Well, one possibility could be that Naruto somehow gains the ability to perform bankai. He might use it in a battle against a powerful new enemy. For example, he could combine his own ninja skills with the unique powers of bankai to create a whole new combat style that surprises his foes.