The story follows Indiana's 1955 Crispus Attucks High School Tigers, the first all-black high school basketball team to win a state championship. Robertson himself played for the team. Aaron Courseault will write the screenplay.
Robertson, who is known as the Big O, and Blankenbaker will co-produce the film, which they estimate will be budgeted at $6m.
The documentary was distributed by Screen Media and Universal handled the DVD release in June 2007.
Miami-based Blankenbaker and Rachel Viollet recently finished a new documentary, A Perfect Match, about tennis players Althea Gibson and Angela Buxton.