There's a story (or rather series of related stories) that's been in my head for years involving dreams and a labyrinth. There's also a D&D campaign that I wrote but never ran years ago that I would LOVE to turn into something outside of my head.
Oh, and Serenity 2
hmmmm, i had an idea like that one. I got it after watching Pans Labyrinth because I thought it was going to be about a girl stuck in a labyrinth and had to find herself out. Labyrinth on the other hand, was closer to that but it wasn't dark like I would've liked it to be. Good luck on the screenplay, who knows maybe we'll be seeing it in theaters someday.