One common theme is the struggle against society. Since their relationship might be seen as unconventional, they often have to face opposition from the world around them.
One key event was the many battles they had. The Asuras would rise up against Indra's rule. Another is the use of powerful weapons. For example, Indra's thunderbolt was a crucial element in the battles. Also, the Asuras' attempts to gain power through magic and trickery were important events.
Asura and Indra are important figures in Hindu mythology. Indra is often considered the king of the gods. Asuras were a group of beings. The Asuras were in a constant struggle with the gods led by Indra. They vied for power, control over the cosmos, and resources. There were numerous battles between them. In many stories, the Asuras were seen as more aggressive and power - hungry, while Indra was seen as the defender of the divine order. However, the relationship was complex, and at times, the Asuras also had their own reasons for their actions, not just being pure villains.
A fanfic could focus on a time - travel plot. For example, Asura or Indra gets sent to a different era and has to adapt while also finding a way back. Along the way, they encounter versions of themselves or each other from that time and have to deal with the consequences of interfering with the timeline.
A fascinating plotline could be that Indra and Asura are sent on a journey through different dimensions by some ancient jutsu. In these dimensions, they see different versions of themselves and their story. They learn from these experiences and come back to their world with a new perspective, which could potentially change the course of the Naruto universe.
Often, other characters from the Naruto universe also make appearances. For example, the various ninja clans like the Uchiha and the Senju. Their loyalties and relationships with Indra and Asura can add depth to the story. Maybe there are also some original characters created by the fanfiction writer to interact with Indra and Asura and drive the plot forward in unique ways.
One interesting idea could be the exploration of how the reincarnation affects Naruto's relationships. For example, how it changes his bond with Sasuke, as Sasuke is often linked to Indra. Maybe it could lead to a deeper understanding between them, beyond their normal rivalry.
One idea could be exploring their relationship in a modern AU. Imagine Indra and Asura as two brothers in a modern city, dealing with normal life problems while still having their spiritual connection. They could struggle with family expectations, like Indra being the over - achieving older brother and Asura the more laid - back one, but they have to come together to face a common threat that has a connection to their past lives.
Well, perhaps a plot where Asura and Indra are given a chance to rewrite their history. They start to understand each other's viewpoints better and try to create a new future for the ninja world. They could also meet their descendants, like Naruto and Sasuke, in a different dimension and exchange knowledge and power.
By showing their shared history. Maybe start with a flashback of their childhood together, how they were friends or rivals from the start. This can set the foundation for their complex relationship in the present of the fanfic.