Following the trend of H20, it looks like Halloween 8 will evolve that with Halloween H2K: Evil Never Dies.
From HalloweenMovies.com:
Paul Freeman, producer of several films in the HALLOWEEN series, has announced the current working title for the next installment in the series is HALLOWEEN H2K - EVIL NEVER DIES. Several writers are currently working on scripting the new movie, which will most likely feature a return to Haddonfield in the storyline. The HALLOWEEN 8 fan feedback that this website recently collected played, and will continue to play, a large role in the shaping of this new movie. The movie will most likely be shot in Salt Lake City, home of previous sequels. HALLOWEEN H2K, distributed by Dimension Films, is targeted for a Fall, 2000 release.