A Luke / Anakin hybrid concept meant to depict the temptation and lure of the Darkside. As Luke is lured by the temptation of more knowledge and greater understanding of all aspects of The Force , he edges closer to the realities of what that did to his father. Before TLJ released I imagined him alone in exile,never expecting to be found again . Exploring knowledge that once was forbidden to Jedi . This knowledge ensnared him and drew him ever closer to the dark. So when Rey arrives Luke is already tempted by The Darkside , something he tries to hide from Rey, But she senses a darkness in him none the less . I thought this would be a cool twist on what happened to him after being all alone for years with ancient texts.