In the era of the Old Republic, Starkiller's abilities would be quite different. The Force was more in tune with the natural order then. His raw power might be more subdued as he would have to adapt to the more traditional ways of the Jedi and Sith. For example, his lightsaber combat might become more refined in the style of the ancient Jedi, rather than his more aggressive style from his own time.
In a post - Star Wars sequel trilogy time period, Starkiller would find that the Force has evolved in different ways. There are new Force - sensitive groups and different understandings of the Force. His abilities would need to adapt to this new landscape. He might find that his traditional skills are not as effective against some of the new threats, but he could also learn new ways of using the Force from the new Force - users he encounters, thus expanding his own abilities.
His combat abilities might be overpowered in some earlier time periods where the fighting styles are less developed. For example, if he travels back to a time when lightsaber combat was more rudimentary, his advanced techniques could make him seem like a god of war.
Starkiller's abilities would likely have a significant impact. His skills in lightsaber combat combined with his unique Force powers could give him an edge over many opponents. This could make him a target for both sides in the Clone Wars. The Jedi might see him as a potential ally but also a wild card, while the Sith would either want to use his power or eliminate him as a threat. His ability to use the Force in creative ways could also inspire new strategies among the clone troopers or the separatist droids.
Starkiller is the central character in this story. He's likely to be a character with unique abilities and a significant role in the Star Wars universe.
His Force abilities could give an advantage to the side he supports. He could use telekinesis to turn the tide in battles.
His Force abilities could be different. Maybe he would discover new aspects of the Force in the past that were lost in his original time. For example, he could learn ancient Force techniques that were forgotten over time.
Another plot could involve Starkiller traveling to the time of the Old Republic. He could interact with the ancient Jedi and Sith, learning their ways and perhaps even influencing the development of the Force teachings. Maybe he discovers a long - lost Force technique that changes his perspective on the Force and his own powers.
He's often portrayed as a powerful and mysterious figure. Writers in fanfiction may show him using his Force abilities in creative ways that we don't see in the main Star Wars canon related to Star Wars Rebels. He could be a force for good, despite his past, and his presence might inspire the Rebels to take bolder actions against the Empire.
Starkiller can be a game - changer in Star Wars crossover fanfiction. He can bring his combat skills and Force knowledge to new settings. For example, if he's in a crossover with the Matrix universe, his ability to sense and manipulate the Force could be compared to Neo's ability to control the Matrix.
First, research both characters well. Know Starkiller's powers and his backstory, and also understand Padme's role in the Star Wars universe. Then, think of a unique plot. It could be something like Starkiller is sent on a mission that involves protecting Padme. Start with a strong opening that grabs the reader's attention, like a sudden attack on Padme that Starkiller has to fend off.
One interesting aspect of Starkiller in Star Wars crossover fanfiction is the potential for him to interact with characters from other universes. For example, he could meet characters from the Star Trek universe. This would create a really cool dynamic as his Force - using abilities would contrast with the more technological - based powers in Star Trek.