What is the prologue in the twilight saga eclipse?

In Twilight the movie, the foreshadowing is at the end when Edward and Bella go to prom and Jacob just finished speaking to Bella. When Edward and Bella start to walk away Edward say something like "I leave you alone for one minute and the wolves descend." That is for shadowing because of what happens in New Moon. Also in the movie, the last thing u see is the character Victoria reappear looking like she wants revenge so that would be foreshadowing as well.