I really doubt that such a thing will happen, but, please let us know if that should take place. Truly unique ideas are very rare which is why there is always controversy over who actually invented anything. There are many alternate candidates for the steam engine and Charles Fort said it was invented when it happened to be steam-engine time.
My guess is that you will be better off just sharing your idea and if it really is that unique, people will recognize your genius. Anyhow good luck in trying to set up that bargin.