Most of the cast and crew disowned this movie. On the Halloween: 25 Years of Terror (2006) DVD, they stated that the studio, producers, and director interfered and argued to the point of ridiculousness which resulted in a very poorly directed and edited film.
The producers of the movie wanted Brian Andrews to reprise his role as Tommy Doyle from the original Halloween (1978). However, Andrews did not have an agent, so they could not get in contact with him, and the part went to Paul Rudd instead. Andrews has stated since that he regrets missing the opportunity. He could have had another shot at playing the part in Halloween Kills (2021), but by that time, he had retired from acting, and Rudd had a scheduling conflict with another movie, so the role was re-cast again.
In early 1995, after filming and editing was completed, Halloween 6 was given a test screening which, as described by actress Marianne Hagan, "consisted primarily of 14-year-old boys." During the Q&A afterward, one of them expressed great displeasure at the ending of the film, which entailed a Celtic ritual and the passing on of the Curse of Thorn from Dr. Wynn to Dr. Loomis. This led to re-shoots being planned in order to craft a new ending, but there was a big problem: Donald Pleasence, who was already in ill health during the shooting of the film, had died on February 2, 1995 from complications of heart valve replacement. Reshoots for a new ending took place in Los Angeles, California in the summer of 1995, using a stand-in for Pleasence, but over twenty minutes of other footage was changed as well, leaving gaping plot holes that rendered the film nearly incomprehensible.
As a result of Donald Pleasence's death, as well as creative differences between Joe Chappelle and the producer, and an allegedly bad test screening of the original work (the famous producer's cut) re-shoots were done as well as lots of editing, to the anger of most of the cast and crew. Many vowed never to make another Halloween movie again after all the changes.