The Emperor could still be a major antagonist. Even though Anakin turned on him in the end, his influence might still be felt. He could send his agents to try and find baby Luke to eliminate any potential threats to his power.
One possible plotline could be Anakin, in a redeemed state, secretly protecting baby Luke from the remaining threats in the galaxy. He uses his remaining Force abilities to shield Luke from danger without revealing his identity.
Anakin, on the other hand, has a complex history. He was once a great Jedi, then fell to the dark side and became Darth Vader. In this fanfiction, he is in a redeemed state or perhaps a state where he is still grappling with his past actions. His presence in the story is crucial as he is the father figure that Luke has been seeking to understand.
In this fanfiction, Luke might initially be in awe of meeting his father, Anakin. He could be conflicted between the image of the evil Darth Vader and the redeemed Anakin he has heard about.
The main characters are Anakin and Luke. Anakin has this whole arc of being a Jedi prodigy, falling to the dark side, and then potentially finding redemption. Luke is the one who has been on a journey to discover his heritage and become a great Jedi. When they meet, it's like two parts of a story coming together. Their different experiences with the Force, their relationships with other characters like Leia and Han, all these elements can be explored through their encounter in the fanfiction.
Maybe Anakin meets Luke on a desolate planet. At first, Luke is hesitant and a bit scared as he has heard so many stories about Darth Vader, Anakin's dark side. But Anakin shows him that he has regained his true self. They start to talk about the Skywalker legacy, and Anakin tells Luke how he wishes he could have been there for him while he was growing up, and how Luke can avoid the same mistakes he made.
The theme of forgiveness also pops up a lot. Luke has to forgive Anakin for all the wrong he's done. Some fanfictions show this as a long and difficult process. Additionally, the exploration of the Force as a bond between them is common. It's like the Force is what brings them together and helps them understand each other on a deeper level. For example, in some stories, they can communicate through the Force in a very special way that normal people can't.
One great 'anakin and luke fanfic' is 'The Skywalker Bond'. It beautifully explores their relationship, delving into how Anakin's past actions impact Luke's journey. The story has some really emotional moments where Luke tries to understand his father's complex history. It also features some great action scenes that are true to the Star Wars universe.
The theme of hope also runs through a lot of baby Anakin fanfiction. Despite his difficult circumstances as a slave, there's always a glimmer of hope for a better future, whether it's through his own skills, the kindness of others, or the potential he has within due to his connection to the Force.