As I watched the Prequel Trilogy I noticed that there were several things in those films that foreshadowed things to come. For example in several scenes in Attack of the Clones there were instances of people standing on balconies looking out over a landscape that had hints of things that we would see in the Original Trilogy. Obi-Wan looking out over the balcony on Geonosis at the Clone Troopers is an example of this. There are countless others scattered throughout the films. It would be interesting to see others views on this.