Dave McNary Film ReporterMGM has launched development on a Sammy Davis Jr. biopic with Lena Waithe and Rishi Rajani producing through their Hillman Grad banner, along with Sight Unseen’s Julia Lebedev and Eddie Vaisman.The untitled project is based on the 1996 biography “Sammy Davis Jr.: My Father,” written by Davis’ daughter Tracey Davis and Dolores A.