Yes, in some ways it can be considered dark. There are elements of lost childhood, abandonment, and the constant struggle between imagination and reality.
Well, it depends on how you interpret it. You could say the concept of children being lost in a fantasy world and never returning to reality has a sort of dark aspect to it.
Peter Pan's story has a dark undertone in that it shows the fear of growing up and the consequences of constantly running away from reality. His world might seem magical, but it also masks a deeper longing for something more substantial and the pain of never truly evolving.
The Lost Boys' situation can be seen as part of the dark side. They are essentially orphans, left alone in Neverland. There's a sense of abandonment and a lack of a proper family structure which is quite sad.
One key element is the character of Peter Pan himself. He is not the entirely innocent boy as often portrayed in lighter versions. In the dark story, he can be quite self - centered. Another element is Neverland. It has a sense of danger and mystery that goes beyond the fun - filled place in the more common tellings. For example, the Lost Boys are not just a group of carefree kids but are in a rather precarious situation under Peter's leadership.
One of the dark elements is Captain Hook's menacing presence. He is constantly after Peter Pan, which creates a sense of danger. Also, the Lost Boys' situation is a bit eerie. They are boys lost in Neverland without proper parental figures, and their wild and somewhat lawless existence can be seen as a bit dark.
Peter Pan is in love with Wendy. Wendy's arrival in Neverland changes things for Peter. She brings a sense of warmth and home - like feeling. Peter is drawn to her because she has qualities that are lacking in Neverland. She can cook, tell stories, and provide a nurturing presence. Peter's love for Wendy is shown through his eagerness to have her stay in Neverland and be part of his world, although he doesn't fully understand the nature of adult - like love.