If Megatron travels through time, he might become more cautious. Having seen the consequences of his past actions, he may be less impulsive. For example, instead of rushing into battles, he'd plan more carefully.
His arrogance could either increase or decrease. If he sees how his past overconfidence led to setbacks, he might become more humble. However, if he realizes how much power he could have had by changing certain events, his arrogance could grow as he believes he can now rewrite history to his liking.
If Megatron travels back to a time when he was just a gladiator, he might be more brash and less calculating. His focus would be on survival and rising to power through brute force.
One plot idea could be Megatron traveling back in time to the very beginning of the Cybertronian war. He could try to change the initial strategies that led to his early defeats, using his knowledge of future events. Maybe he'd attempt to eliminate Optimus Prime before he becomes a major threat.
One possible plotline could be Megatron traveling back in time to prevent his own creation. This would create a paradox as his actions in the present are a result of his past self. Another could be him going to a time when the Autobots were at their weakest and trying to finish them off once and for all.
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.
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.
If Naruto was a Megatron fan, he might become more assertive. Megatron is known for his strong leadership and determination. Naruto could adopt some of these traits, becoming more confident in making decisions and leading his team. He might also be more willing to take risks, like Megatron does in battle.
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.
First, think about your OC. Decide on their appearance, personality, and special abilities or skills. For example, if your OC is a strong fighter, how did they become so skilled? Then, consider how they will interact with Megatron. Will they be an enemy right away or will there be some initial misunderstanding? Next, plan the setting. Is it on Cybertron? Or on Earth during the battles between Autobots and Decepticons? Start with a strong opening that grabs the reader's attention, like a battle scene where your OC first encounters Megatron.
It's a relationship based on mutual respect for each other's skills. Soundwave's intelligence gathering and stealth abilities are respected by Megatron. And Megatron's leadership and strength are recognized by Soundwave. They work well together as a team in most cases. For example, in battles, Soundwave provides crucial information to Megatron which helps him make strategic decisions.
One common theme is redemption. Megatron has a long history of being a villain, and in many fanfictions, Bumblebee becomes the catalyst for his possible redemption. For example, in stories where they are stranded together, Bumblebee's positive attitude might start to make Megatron question his actions.