Posted in ENTERTAINMENT PowerTrip metal mega-festival rumored for Empire Polo Grounds in fall March 28, 2023 On Tuesday, Goldenvoice teased news of a hard-rock festival in Indio, Calif., in the fall, with rumored acts Metallica, Iron Maiden and Ozzy Osbourne. https://www.latimes.com/entertainment-arts/music/story/2023-03-28/powertrip-metal-festival-metallica-ozzy-osbourne-iron-maiden-empire-polo-grounds-golden-voice