If it were just called Season Of The Witch it could've done better but as it is it's still a decent horror film and tons better than all the stupid horror films of the 80's.
The best was that on the VHS copy of the movie, the description on the back was entirely a disclaimer stating that it had nothing to do with the previous Halloween movies. It never mentioned what this movie was about at all.
The story was an awesome concept, but it's an awful movie. Naturally, you have to suspend a certain amount of disbelief in a movie (sometimes even more so in a horror film), but the execution of this one was just plain stupid.
First, don't make your 'hero' an unlikeable creep with a drinking problem.
Secondly, the curse is from a stolen piece from Stonehenge! Wow...um, wait, what? Who the hell stole part of Stonehenge without anyone noticing? And how is it cursed? You can't just swipe a landmark and tell everyone it has magical turn-your-Halloween-mask-into-snakes-and-bugs powers without a better explanation other that "Well, we don't know where this came from..."
Third, the big giveaway will be at 9:00! On what coast? If the villian is planning some nationwide mass killing, odds are good that if it's at 9:00 everywhere that word will get out once the East Coast finds out what the prize is.
Fourth, the bad guy thought this was a practical joke? He thought he would be able to sit back and laugh? He'd become a mass murderer and spend the rest of his life being hunted down around the world. So yeah, that sounds hilarious for him.
Fifth, network TV isn't going to shut down all of their stations because a crazy person calls them in hysterics from a gas station.
Sixth, someone showed up at the factory to get more Halloween masks the day before Halloween? By the time she got back to her store, Halloween would be over.
I do get a kick of this movie, because it's hilarious in its badness, but it really is a dreadful movie.