Out this week is one of the best all-star concerts never seen before on screen until now, 'Soul Power.'

Muhammad Ali and George Foreman's 1974 fight in Kinshasa -- widely kniown as the 'Rumble in the Jungle' -- was an instant legend, but no less momentous was the music festival that accompanied it. Documented by a bevy of cameramen, including the great Albert Maysles, the event assembled some of the best African-American and native African soul musicians -- James Brown, B.B. King, Bill Withers, Miriam Makeba, Celia Cruz, The Crusaders, Sister Sledge and others--for three days of electrifying, and at times explosive, performances.

In other movie news, Summit Entertainment presents two sci-fi action-adventure films on DVD and Blu-ray this week: 'Knowing,' starring Academy Award winner Nicolas Cage and 'Push,' starring Chris Evans, Dakota Fanning and Djimon Hounsou.

In 'Knowing,' a college professor (Cage) opens a time capsule that has been dug up at his son's elementary school. In it are some chilling, accurate predictions of disasters ... when, where and how many will die. Most of these events must uncover the details of the next disasters in hopes of preventing them. If he fails, who knows how many may die? Bonus features include director commentary and two featurettes: 'Visions of the Apocalypse' and 'The Making of a Futuristic Thriller.'

In the futuristic sci-fi thriller 'Push,' a group of young Americans (Evans, Fanning and Belle) with extraordinary psychic abilities must band together and use their different talents on a mission that will enable them to escape a clandestine government agency. Bonus materials include deleted scenes with director commentary, the featurette: "The Science Behind the Fiction" and director and cast commentary.

Before the latest Harry Potter film, 'Harry Potter and the Half-Blood Prince' comes to theaters next week, one can watch the documentary, 'We Are Wizards,' which profiles some of the power players in the underground Harry Potter community.