Not sure exactly, but maybe in a special edition or spin-off 'Star Wars' comic. Sometimes these story developments happen in limited series or special story arcs. You might have to do some digging to find the right one.
In certain comic storylines, Luke Skywalker does encounter moments that tempt him towards the dark side. However, it often depends on the specific context and the creative direction of the comic series.
There could be multiple reasons. Maybe he was betrayed by someone he trusted, or he was lured by the power the dark side promised. Also, his past traumas might have played a role in his decision.
One main factor could be the influence of a powerful dark side figure. Such a figure might manipulate Luke's emotions, like his fear or anger. Maybe they prey on his insecurities about his abilities or his place in the galaxy.
In certain comic storylines, Luke Skywalker does encounter situations that challenge his allegiance and he shows moments of being influenced by the dark side. But it's not a permanent turn.
Occasionally, comics depict Luke Skywalker having encounters or internal conflicts involving the dark side. But it depends on the specific comic storyline and context.
It could be that it shows some hidden or negative aspects of the characters or storylines.
One of the main themes is the struggle between good and evil within Luke himself. In these fanfictions, we see how his inner conflict plays out. Also, the theme of redemption might be present in some, where there is a possibility for Luke to come back from the dark side. And the exploration of the dark side's allure, like the promise of quick solutions to problems compared to the more difficult path of the Jedi.
In the dark side comics, Luke Skywalker is often shown struggling with his inner demons and the temptation of the dark side.
Luke's friends from the light side could also be important. Characters like Leia, Han Solo, or Chewbacca. Their reactions to Luke's turn and their attempts to bring him back would be significant aspects of the story. There could also be new characters created specifically for this novel, perhaps some Jedi who were thought to be dead but are actually in hiding and oppose Luke's new path.
One interesting 'Luke Skywalker dark side' fanfiction could be where Luke turns to the dark side after being constantly betrayed by the New Republic. In this story, he might use his newfound dark side powers to take revenge on those who he feels have wronged him. He could form an alliance with remnants of the Empire and become a powerful and feared Sith - like figure in the galaxy.