Ladies and gentlemen, Darkness of the Spirits is currently being worked on in the form of Avatar Z. Right now, I'm trying to make a fanfic story out of Avatar Z and currently, there are two planned "books."
Light: You basically get the premise from reading Avatar: Darkness of the Spirits in my journal section.
Darkness: Here, we see Uri after a certain tragedy occurs. I can't say what that is, but you may see him being a more important character than even the first five chapters let on.
Basically, I've been wanting to do this fanfic for a long time and thankfully, I'll get to. I just need to cook it to perfection in the form of writing about it and planning it out. That, and finishing Korra Book Two. If you've read the story, you know that this is not set in the timeline of Korra; it may have some elements where it does branch off into its own idea, so that the basic concept of the Dark Avatar story can be told. Therefore, some of the spiritual dynamics of the Avatar universe may be different, in order for this story to happen. However, they are purely enforced on the basis that the first series is unchanged in its canon, which serves as the foundation. This is not a story involving Dragonball Z; it does, however, use 'Z" as DBZ does in the form of 'Z'/'Zetto' (Think Mazinger Z and One Piece Z; 'zetto' meaning 'last.) Basically, it's my way of telling 'a fourth book of Avatar: the Last Airbender.
The story you are reading below is meant to be semi-paradoxical. It serves as a prologue to Avatar Z, but in a juxtaposition of what seem to be reincarnated versions of Jet and my original character, Uri. It's set after Avatar Z, primarily because it's a short story that explores the idea of Uri and the classic character of Jet working side by side. For those who haven't read Darkness of the Spirits in my journal section, I suggest you check it out before reading this.