Canceled movie

Freddy vs. Jason
This movie was in development hell for a long time, some scripts feature Pinhead during the climax, the sequels should have shown Ash Williams, Leatherface, or Michael Myers.

Halloween vs Hellraiser
With the success of Ronny Yu's movie Dimension began the production of a crossover between these two majors horror licenses.

Max Landis' in production script
Max Landis, son of John Landis, wright a script on Pinhead manipulated Chucky, Freddy, and Jason in the "Dream World"

Don Mancini's abandoned script
The creator (with Tom Holland) of Chucky Don Mancini makes the script of a potential crossover between both of the greatest fantastic slashers "Chucky" and "Freddy Krueger.

Hack/Slash
Another film in development hell, this film should have been directed by Marcus "Texas Chainsaw massacre (2003)"/" Friday the 13th(2009)" Nispell

Dexter vs Hack/slash vs Jason Voorhees
Tim Seeley's post on his deviant art accounts a page of a potential crossover between Cassie Hack, Dexter Morgan and Crystal lake's killer.

Crossover with exteernal license

 * Jason vs Supernatural
 * Pinhead vs Jay and Silent bob
 * Up in Smoke vs Jason