The Steamboat Willie-inspired horror movie Screamboatwill hit theaters before being releasing for streaming and VOD, and here’s all the available information. The Steamboat Willie version of Mickey Mouse is just one of the many characters and franchises to lose their copyright in the 2020s, opening up a world of possibilities for filmmakers. One day after Steamboat Willie became part of the public domain, director Steven LaMorte announced he was developing a horror movie based on the character and Disney short.