Super Mario Bros. 2

Super Mario Bros. 2 would have been a sequel to the 1993 movie Super Mario Bros. 

Plot
The plot is unknown.

Why it Was Cancelled

 * 1) The poor reception of the first movie killed any chances of a sequel being successful.
 * 2) The actors hated the first movie.
 * 3) The first film failed at the box office.

Result
The film was cancelled, but a comic book titled Super Mario Bros. 2 was written and acts as a sequel to the movie.