There're still plot options that can come from it, and some spinoff is ongoing (Haze's storyline, for example) but, as AH mentioned, the original idea probably poofed.
So, it could be a poofed opportunity that gets ignored as other storylines are followed, but there're openings there if anyone wants to follow up on 'em.
Me?
I was going to do the story with vampires instead of the bad guys that were used. On the one hand, we've never really had a good vampire plot, but, on the other, vampires are a wee bit played out, so.