A high-art movie where practical effects are used extensively so there are no characters shown. All you hear is their voices and the physical effect on the scene from their actions. Imagine a movie and edit out the people. There would be no known actors used, so the viewer is left to imagine what each character looks like. Voice actors would be selected with as many as possible that don’t look like they sound.

It would later be followed up with interviews with the actors. Between the two aspects it could be used as a tool of introspection to understand your biases in perception of others.

It would be such a financial loss, there is zero chance it would ever make money.