One possible fanfiction could be about Dark Optimus Prime's origin. Maybe he was corrupted by a powerful dark energy source in the Transformers Prime universe. This could lead to him having different goals and motives compared to the regular Optimus Prime, like ruling Cybertron with an iron fist instead of leading it to peace.
A fanfiction might focus on the battles that Dark Optimus Prime gets into. He could be facing off against the Autobots who are trying to bring their old leader back to the light. The fight scenes could be intense, with his dark powers clashing against the Autobots' determination and courage.
Another idea for a fanfiction is that Dark Optimus Prime forms an alliance with some of the Decepticons. This alliance could be uneasy at first, as both sides have their own agendas. But together, they could pose a huge threat to the remaining Autobots and the stability of Cybertron.
A plotline could be Dark Optimus Prime's redemption. Maybe he realizes the error of his ways after causing a great deal of destruction. This could involve him facing his inner demons and seeking forgiveness from his former comrades.
One possible fanfiction could be about Arcee and Optimus teaming up for a dangerous mission. They might face a powerful new enemy that neither of them has encountered before. Their combined skills and trust in each other would be crucial in overcoming the challenges. For example, Arcee's agility and Optimus' strength could be used in a complementary way to defeat the foe.
In a fanfiction, Ratchet and Optimus could be sent on a secret mission. They are alone, away from the rest of the Autobots. This gives them a chance to have more personal conversations. They might discuss their hopes for the future of Cybertron, their fears about the Decepticons, and their memories of the old days. The story could show how they support each other not just in battle, but also on an emotional level.
One great fanfiction could be about Optimus and Arcee going on a dangerous mission together. They face numerous challenges, like battling a powerful new Decepticon. Their teamwork and trust in each other are put to the test. Arcee's speed and agility combined with Optimus' strength make them a formidable duo. Along the way, they might have some deep conversations about the future of their race and their place in the war.
Perhaps a fanfiction where Arcee and Optimus are transported to an alternate dimension. In this new world, they have to figure out how to get back home while also dealing with the strange new rules and inhabitants. They might find that their relationship is put to the test as they face unfamiliar and often dangerous situations. They could also learn new things about each other that they didn't know before.
One plot idea could be Optimus Prime losing his memory and having to rediscover who he is while the Autobots try to protect him from the Decepticons. Another could be a story where Optimus Prime has to team up with an unlikely ally, like a human who has a special power that can help in the fight against the Decepticons. Or perhaps a plot where Optimus Prime travels to a different dimension and has to find his way back while facing new enemies.
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.
Optimus Prime crashes on an alien planet during a battle. This planet is inhabited by shape - shifters. At first, they are wary of Optimus, but as they see his noble nature, they decide to help him repair his ship. In return, Optimus helps them defend their planet from an incoming invasion. He teaches them some of his combat strategies and they combine their shape - shifting abilities with his strength, creating a unique and powerful defense force.
One idea could be a story where Optimus Prime has to team up with an unlikely ally from another planet. Maybe a small, scrappy alien that has some unique abilities that can help in the fight against the Decepticons. This would add an interesting dynamic as Optimus has to learn to work with a very different being.
One way is to explore his relationships more deeply. For example, his relationship with Bumblebee could be developed further. Maybe there could be a story where Bumblebee is in a really tough situation and Optimus has to make a difficult choice to save him, which would show his loyalty and the lengths he would go to for his comrades.