A fanfiction could focus on a time when Megatron and Soundwave are separated. Maybe Megatron has been captured by the Autobots, and Soundwave is left to lead the Decepticons in his absence. Soundwave, who is not used to being in the spotlight, has to make difficult decisions. He has to figure out how to rescue Megatron without sacrificing too many of their troops. Meanwhile, Megatron is facing his own challenges in captivity, perhaps having to deal with Optimus Prime's attempts to make him see the error of his ways. This situation could create a lot of tension and drama in the fanfiction.
In a fanfic about Optimus Prime x Megatron, their relationship could be explored in a more philosophical way. For example, they might debate the nature of good and evil, power and responsibility. Optimus believes in protecting all life, while Megatron has his own ideas about power and how it should be used. This kind of fanfic could show how their different viewpoints could either bring them closer together or drive them further apart.
A great angle for a Megatron x Optimus Prime fanfic could be a body - swap situation. They are forced to inhabit each other's bodies due to some alien technology gone wrong. This leads to them having to understand each other's perspectives on a whole new level. They start to see the reasons behind their actions in the past and develop a new - found respect for one another.
A fanfiction could also explore a post - apocalyptic Cybertron where Megatron and Optimus Prime are the last two Transformers alive. They have to put aside their differences to try and rebuild their world. This would be a very emotional and character - driven story. They would have to confront their past actions and the reasons for their long - standing feud. As they work together, they might discover that they are not so different after all, and that their shared love for Cybertron could be the key to its restoration.
In a fanfiction, it could be interesting to see a scenario where Megatron and Optimus Prime are reborn in a different time and place, perhaps in a peaceful Cybertron that has long forgotten the war. They might struggle to adapt to this new world where their old identities as war leaders are no longer relevant. Their journey could involve rediscovering themselves and learning to live in harmony, which would be a huge departure from their traditional roles.
One possible fanfiction could be that they are brothers separated at birth. Megatron is raised in a harsher part of Cybertron, which shapes his more aggressive views, while Optimus Prime is raised in a more diplomatic environment. Their reunion could be a turning point for the entire Cybertronian civilization.
In a fanfiction where they unite, it could start with a common threat that neither side can face alone. For example, an alien race invades Cybertron. Megatron and Optimus Prime realize that their brotherly bond is stronger than their differences. Together, they could form a new strategy, using both Autobot and Decepticon forces in a coordinated way to repel the invaders.
There are fanfics that focus on the origin story of Megatron and Soundwave's partnership in the Transformers Prime series. It could explore how they first met and started working together. Maybe it shows Soundwave's unwavering support for Megatron from the very beginning, and how they built their strategies against the Autobots over time.
The plot could be about a power struggle. Megatron wants total control over Cybertron, but Optimus Prime stands in his way. However, instead of just fighting, there are political intrigues involved. There could be other characters influencing their decisions. Maybe some Autobots who think Optimus is being too soft on Megatron, and some Decepticons who think Megatron is being too cautious.
In a Megatron x Optimus Prime fanfic, the story could also be about a power struggle within themselves. Megatron is tempted by an ancient power source that could give him ultimate control. Optimus Prime tries to stop him not as an enemy but as a friend who is worried about Megatron's well - being. Their interactions are filled with emotional turmoil as they try to balance their friendship with their duties.