Well, in many fanfictions, their relationship development can be quite unexpected. For example, in one story, a spell or some sort of technological malfunction makes them share each other's memories. This experience makes them see the world from the other's perspective. It completely changes their relationship. They start to empathize with each other, and from there, a bond forms that is based on understanding and a new - found trust.
In some fanfictions, their relationship starts with hostility. Megatron sees Female Optimus Prime as an obstacle to his power. But as events unfold, like facing a common enemy, they begin to cooperate. This cooperation slowly turns into mutual respect.
Often, in these fanfictions, their relationship is a complex dance. Female Optimus Prime tries to understand Megatron's motives. She realizes that he isn't just pure evil. Meanwhile, Megatron is intrigued by her different leadership style compared to the male Optimus Prime. This leads to a relationship that is full of twists and turns as they both navigate their feelings and goals.
The key elements include the power struggle. Since both Optimus Prime and Megatron are powerful leaders, their struggle for power can be re - imagined in a more intimate or emotional way in lemon fanfictions. There's also the idea of redemption or change. Maybe Megatron shows a softer side or Optimus Prime has to deal with feelings that go against his usual principles. And of course, the setting and the way the story is narrated to create an atmosphere that can support this rather strange but interesting relationship.
Fanfiction about them can explore different universes and scenarios. For example, what if they were raised together? How would their relationship be different? It gives fans a chance to play with the established lore and create new and exciting stories that the official Transformers storylines may not explore. It also allows for deeper exploration of their motives and personalities.
In a unique way, their relationship could be developed if they were both trapped in a virtual reality world created by an unknown force. In this world, they have to rely on each other's skills to survive and escape. As they work together, they start to respect each other's abilities more and their relationship changes. They might not become friends, but they would have a different kind of understanding.
You can try looking on some fanfiction websites like Archive of Our Own (AO3). It has a large collection of Transformers fanfictions, and there might be some related to Optimus Prime and Megatron in the MPreg genre.
A really cool fanfiction I read had Female Optimus Prime and Megatron in an alternate reality. They were both outcasts in their own worlds. They formed an unlikely alliance and the story focused on their journey together. It was full of action and also some really sweet moments where they showed that they cared about each other's well - being, despite their past enmity.
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.
One unique way is to show their relationship as a spiritual connection. In the fanfiction, they could be two sides of the same coin, representing different ideologies but also being linked on a deeper, almost metaphysical level. They might have shared dreams or visions that they initially don't understand but later realize are a sign of their connection. This could lead to some very interesting interactions as they try to figure out what this connection means for their war.
One possible fanfiction could be about Optimus Prime and Megatron having to team up against a greater threat. Maybe an ancient evil from Cybertron's past resurfaces that is so powerful that their usual enmity has to be put aside. They start off distrusting each other but as they face battles together, they gradually come to respect the other's fighting skills.
Secondly, create a unique setting. Instead of the usual battle - torn Cybertron, set the story in a parallel universe where the Autobots and Decepticons have different roles or in a post - apocalyptic Cybertron where they have to rebuild together. This can add a fresh perspective to their relationship.