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!" Unfortunately, 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.
 * 3) It was an obvious rip-off of E.T.

Result
The sequel was permanently cancelled, and the first film remains as a stand alone.