I had an idea for a fic that had something to do with the arch in the department of mysteries, because it is one of the few things that JKR left unexplained, and didn't elaborate much on, however, I'm not sure what to do with it past that. If anyone wants to go ahead and write their own fic with this idea, go ahead.
Um, can you be more specific? What is the idea exactly?
The Arch, or Veil, has been written about by a few authors. For instance, is this a Sirius falling through the Veil story you have in mind? Maybe he returns. Maybe someone jumps through to pull him back.
Is there a plot for someone to adopt, here?