What if Qui-Gon wasn't having a very good day that day on Tatooine and didnt want to mess with some slave kid, or there was no sand storm and they never had to take shelter. I'll tell you what would have happend, nothing. He never would have made Obi Wan promise to train Anakin and there would never had been Vader. Do you think that Sidious would have found a different "Vader"? Was the whole Star Wars Saga controlled by the Prophecy? Just something I wanted to bounce around.