12/20/2024 by Vlada Gelman TVLine.comQuestlove’s Sly Stone Documentary to Premiere at 2025 Sundance New documentaries about Selena, John Lennon and Yoko Ono, Jeff Buckley, and Sly Stone are among the films competing at the 2025 Sundance Film Festival next month.Amir “Questlove” Thompson’s...