There might be a fanfiction where young Palpatine discovers an ancient Sith artifact. This discovery could set him on a path that accelerates his journey to the dark side. He might have to outwit some Jedi who are also after the artifact, leading to a series of thrilling encounters.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of Star Wars fanfiction, and there's likely to be some great young Palpatine stories there. Just use the search function and type in 'young Palpatine' and browse through the results.
Anakin might betray Palpatine to save someone he loves. If Palpatine threatened Padmé in some way, Anakin would surely turn against him. After all, Anakin's love for Padmé is one of his strongest driving forces.
In a fanfiction where Naruto is hired by Palpatine, one possible scenario is that Naruto's sense of justice clashes directly with Palpatine's tyranny. Naruto, being used to a world where there are clear good and bad guys, would quickly realize that Palpatine is on the wrong side. He might try to persuade Palpatine to change his ways, using his own experiences of redemption and growth. However, Palpatine is a very stubborn and power - hungry character. So, it would likely result in a battle of wills. And depending on how the fanfiction is written, Naruto could either succeed in changing Palpatine or have to fight against him to protect the innocent in the Star Wars universe.
In Star Wars fanfiction, Ken Palpatine could potentially be an original character created by a fan. He might be related to Emperor Palpatine in some way, perhaps a distant relative or a character who emerges in an alternate universe story where the Palpatine lineage has different branches and developments.
The storyline would take a huge turn. Instead of the Empire rising as it did in the original, there could be a new era of peace. The Jedi Order might be restored more quickly, and Anakin could become a hero instead of Darth Vader.
In this fanfiction, the story might start with Naruto being recruited by Palpatine in a very sneaky way. Palpatine might disguise his true intentions well. As Naruto begins to work, he starts to notice the negative impact of Palpatine's actions on the people. Naruto's strong moral compass kicks in, and he tries to find a way to stop Palpatine without causing too much chaos. He might try to use his charisma and the relationships he builds in the Star Wars universe to create a resistance against Palpatine. It could be a story of Naruto's struggle between his loyalty to his new employer (at first) and his sense of what is right and wrong.
It could be that a powerful wizard in the Harry Potter universe sends Harry to defeat Palpatine for some greater good. Harry's quick thinking and his array of spells like Expelliarmus or the Killing Curse (although he hates to use it) could potentially be used against Palpatine. Since Palpatine is used to dealing with lightsabers and the Force, Harry's magic could catch him off - guard.
One idea could be that Palpatine somehow discovers the wizarding world of Harry Potter. Maybe he sees it as a new realm to conquer. He could try to manipulate the Ministry of Magic using his Sith mind - tricks, and Harry Potter would have to figure out who this strange new threat is and stop him. It would be a clash of two very different kinds of magic.