The end point was 2005's Star Wars: Episode III - Revenge of the Sith, in which Anakin's fall to the Dark Side was shown.
J.J. Abrams' friend and The Force Awakens actor, Simon Pegg, reminisced about Lucas' past contributions in an interview. Revenge of the Sith was the last part of the trilogy that ended in Return of the Jedi. John Williams' " Duel of the Fates" was used in the battle to support the fate of the galaxy. The cultural impact of Revenge of the Sith was astounding because of innovative new technology and a story that allowed the heroes to be flawed. The time period that Revenge of the Sith took place in was one of the most important and interesting in the entire Star Wars timeline. George Lucas knew the story he wanted to tell from the beginning of the trilogy. The Resistance was too small to defeat the First Order on its own.
Audiences were taken to many different planets in Revenge of the Sith. The Star Wars saga was renamed the "Skywalker Saga" after Lucasfilm was acquired. The Jedi were spread out across the galaxy, trying to end the war quickly, but they were caught in a Sith conspiracy. Lucas explored the political theme of a democracy turning into a dictatorship, but it was the people that surrendered their own freedom for something Palpatine described as "a safe and secure society." The Star Wars saga was turned into a story of a tragic hero after Revenge of the Sith. The saga came to a close with Star Wars: Episode IX - The Rise of Skywalker, which was met with a mixed response. The Clone Wars had reached almost every corner of the universe in Revenge of the Sith.
In Episode III, the Jedi and Sith were experienced and powerful, and that was reflected in the lightsaber duels. While using the larger galaxy as a narrative backdrop, there was a strong focus on Anakin Skywalker as he fell victim to the manipulation of Palpatine. The Star Wars saga is only six episodes, and would never include a seventh film according to him. The size and scale of the universe was portrayed in Episode III.
The Star Wars prequels have a clear end point in mind.
Revenge of the Sith was the result of many looking to Star Wars to get their cinematic dose of sword-fighting action. In an interview with MTV UK, the actor said that he was grateful for the love that there was for the prequels. The film connected the prequel and original trilogies, but it was more than that. J.J.Abrams and Rian Johnson made their own Star Wars films, but they lacked the original creator's touch. Revenge of the Sith showed what he had learned while working on Star Wars.