Throughout the Star Wars franchise, famous villains like Kylo Ren, Darth Vader, Emperor Palpatine, Darth Maul, and more have come and gone. But throughout the franchise, the general threat of the ultimate evil in the galaxy has largely remained the same. In canon, the Sith have been around for thousands of years. Although they went through a prolonged period of hiding in the shadows as the Jedi rose to power, they have still posed a threat and held a true presence in the galaxy. In the Skywalker Saga films, the Sith are the villains the whole way through. Even the sequel trilogy, which appeared to be moving away from the Sith in its first two films, eventually brought back Emperor Palpatine.