Apparently, a ritual is performed on the deceased Myers by the Thorn Cult, the band of weirdos glimpsed in the convoluted 5 and 6. Why, you ask? Because at a little over $60 million, it was the most financially successful Halloween entry since the first, and even garnered some decent reviews from mainstream press.
Not that I'm defending the idea...I mean, the Halloween movies, aside from 1 and 3, blow a lot.
But you did ask, and I did know. M'head (N'dege Ocello?) is full of useless shite.