Due to the way writing credits work, how writers get paid, etc., posting this in public pretty much guarantees that it won't get made. Studios are very adverse to risks of lawsuits, about, say, "Studio X stole an idea that I had for a film, and didn't credit or pay me".

If you think you've got a great idea, for fuck sake, write up a script, get an agent, and shop it around. Don't post it online.