One plot idea could be Tommy struggling to control his vampire side while still trying to protect the city as a Power Ranger. He might have to face enemies who try to use his vampire nature against him. Another could be Tommy finding a way to reverse his vampirism with the help of his Ranger friends, perhaps by seeking out a magical artifact.
A plot could revolve around Adam and Tommy getting trapped in an alternate dimension where the rules of the Power Rangers are different. They have to figure out how to get back to their own world while also dealing with the strange new threats in this dimension. They might meet different versions of their friends and enemies there.
A fanfiction plot could be about a new threat that is specifically targeting the Omnitrix and the Power Rangers' power source. Ben and the Rangers have to figure out how the enemy is doing this and stop them. Along the way, they discover a hidden connection between the two power systems that was unknown before. There could be some character development for both Ben and the Rangers as they struggle to protect what they hold dear.
One idea could be a story where a new ranger from a different planet joins the SPD team. They have unique powers that the others don't, and at first, there's some tension as the team has to adjust to their new teammate. But eventually, they all work together to defeat a powerful new villain.
An interesting plot for Power Rangers OC fanfiction could be an OC who starts off as a villain's minion but then has a change of heart. This OC might be forced to do the villain's bidding at first, but through interactions with the Power Rangers, they see the error of their ways. They could then use their knowledge of the villain's plans to help the Rangers. Maybe this OC has a special ability that is crucial in defeating a major villain in the end.
A more character - centered plot could be about the relationships between the Rangers. Like a story where Emily struggles with her feelings for Kevin, and how this affects their teamwork as Power Rangers. This could add an interesting layer of drama to the fanfiction.
One plot idea could be a baby Power Ranger discovers their powers early. For example, the baby might accidentally activate their morphing ability while playing with a shiny object that turns out to be related to their Ranger powers. Another could be that the baby is the key to saving the Power Rangers from a new villain who has a weakness only the baby can exploit. Maybe the baby has a special power of innocence that can counter the villain's dark magic.
One idea could be a female Power Ranger who has the ability to communicate with animals and uses this to gain an edge in battles. For example, she might get help from a group of eagles to spot approaching enemies from afar.
One idea could be a story where a new ranger has to hide their identity as a ranger from their family who are against any form of superhero activity. It adds a layer of drama and secrecy.
One idea could be exploring the backstories of the Power Rangers before they joined the team. For example, how did they discover their potential? Another could be a time - travel plot where they go back to a crucial moment in the history of their planet or the Power Rangers as a whole. Maybe they could meet their predecessors and learn from them.
Another plot could involve a magical or scientific experiment gone wrong that merges the Naruto and Power Rangers universes. The main character, who could be a combination of Naruto's traits and a Power Ranger, finds himself in a situation where he is surrounded by a group of female characters from both universes who are drawn to his unique abilities and personality. This could lead to a series of adventures where they have to fight against common enemies while dealing with their complex relationships.