Alice in Wonderland (1933)

In the early 1930s, Walt Disney planned on making an adaptation of Alice in Wonderland and was scheduled for a 1933 release.

Plot
The plot would presumably have been a loose adaptation of the book.

Why It Was Cancelled

 * 1) The project was scrapped in favor of Snow White and the Seven Dwarfs.

Results

 * The original version was cancelled.
 * In 1951, Disney released a fully animated movie based on the book of the same name.