Michael Myers vs. Pinhead

Michael Myers vs. Pinhead was a planned crossover movie that was supposed to be made after Freddy Vs Jason.

Plot
Not much is known but the only known parts is - When a group of people went to Michael's house they found the puzzle box, once they solved it they would meet the Cenobites but they would reveal that one of the Cenobites possessed Michael which would explain why he is immortal.

Why it was cancelled

 * 1) The Akkad Brothers who produced Halloween kept the rights to Halloween and didn't want to make movie.
 * 2) The majority of Hellraiser and Halloween fans were not interested in the idea of this film.
 * 3) The same studio pointed out some of the flaws this movie would have faced;
 * 4) "How would Michael solve the puzzle and why would he solve it?"
 * 5) Unlike the Cenobites - Michael was a mute and they worried that this was gonna make the movie boring and also make the fight less interesting.
 * 6) How would a Cenobite posses Michael in the first place?

Results

 * Michael Myers Vs Pinhead was cancelled.
 * In 2018, a new Halloween trilogy started and elements from the film may be inserted in a sequel Halloween Kills.
 * Michael Myers and Pinhead are able to fight in Terrordome: Rise of the Boogeymen, along with many other horror villains.