EXCLUSIVE: Netflix is in talks with “Black-ish” and “BlackAF” creator Kenya Barris and “Happy” singer Pharrell Williams to develop a feature-length musical about Juneteenth – the commemoration of the end of slavery in the United States.Deadline understands that the streamer and the pair are in the early stages of working up a plan for the project, and details about storyline are under wraps, although sources say it is a separate project to the live musical that they announced in 2018.Williams