Last week, fans were finally treated to the first trailer for Star Wars: Episode IX at the Star Wars Celebration in Chicago, and were clued into some exciting news – the return of Emperor Palpatine to the franchise. At the end of the teaser for the over-40-year saga’s final film, titled The Rise of Skywalker, an iconic maniacal laugh flooded the convention room floor. Right after that, Darth Sidious himself, Ian McDiarmid, took the stage to confirm his involvement and say “roll it again” to the uproarious fans at the event and watching at home.
Article source: https://www.cinemablend.com/news/2470616/turns-out-the-emperors-laugh-in-the-rise-of-skywalker-trailer-was-old-footage