Why has there never been a Walt Disney biopic film? Or at the very least, a biopic film focusing on Walt Disney's struggles and challenges to build Disneyland? The film could only be shown in the Disneyland theatre where they show Lincoln's speech if it might be too controversial to the general public.
There has been a biopic about John Nash and the film is A Beautiful Mind.
A biopic about Howard Hughes was made and the film is The Aviator.
Here's a YouTube link to Walt Disney documentary: Secret Lives: Walt Disney (23 Feb 1995) - YouTube
Here's a mock-up biopic poster found on the web: