Matt Donnelly Senior Film WriterWalt Disney Studios is developing an original movie musical based on the songs of American treasure Lionel Richie, Variety has learned exclusively.Tentatively titled “All Night Long,” the new project will use some of Richie’s greatest hits in a live-action project being developed with a theatrical release in mind, sources said.Richie and his manager Bruce Eskowitz are producing the project with Cavalry Media executives Dana Brunetti and Matt Del Piano.