Tesla has just unveiled a new promo clip showing the manufacturing of multiple new automobiles, including the Model Y and Roadster. Among the coupes, semis, and SUVs was a vehicle with similar sill and door designs to the Model 3 that the upcoming Model Y is based on.It’s been reported that Elon Musk stated in an earnings call that the Y will not be built at its Fremont plant because of how busy it is , leading many to assume that the Y will be produced at the new Gigafactory.