I have an idea for a story, which I'm going to post in the forum at a later date. Right now I have a question. If I am writing a story that uses the "mythos" of a few completely different series, that are only connected by their themes, should my story be considered FanFiction? I am using characters from the original stories, yes, but I am completely reinventing many of the original concepts, to a point at which my story has become its own thing. Should I still post it in the FanFiction part of the forum?