I figured I haven't put up a story concept in awhile so here's one I dreamed up recently.
It's a cross between Epic Mickey, Twisted Metal and The Neverending Story
I really like the idea of fiction being treated as a genre in and of itself. Not just sci-fi, fantasy, historical fiction, but the whole of the literary universe spread out as a workable mythos.
That and I've always been intrigued by the concept of a contest where the winner gets a wish. This actually dates back to Something Wicked This Way Comes that had a charming antagonist who offered the heart's desire for a dear price. Steven King's Needful Things had a similar notion. The Saw film series began with the concept but in my opinion never really investigated the moral implications of a situation where a good person could do wrong in order to accomplish something which seemed right.
There also aren't nearly enough competent, interesting female leads out there.
Don't worry! I was supposing in the course of the story that the grandson (or son) of the author of the Chroma series might start writing the series again
That's the thing The Equivocator doesn't bank on: stories never truly die. In Shade's investigations she'd discover that the old stories that were beginning forgotten were actually being reborn in new stories, the threads connecting the past and present.