Mac and Me II

After Mac & Me was over, there was a message that stated at the end of the film "We'll be back!", the sequel was planned for a 1990 release. However, the sequel didn't come into works

Plot
Unknown

Why It Was Cancelled

 * 1) The first film was a critical and commercial failure.
 * 2) The stars of the first film quit after it failed at the box office.

Results

 * The sequel was permanently cancelled.
 * The first Mac and Me is a stand alone film.