In Don Mancini’s original first draft of the screenplay, the Chucky doll was not possessed by a serial killer at all. Rather, it was a manifestation of the boy’s ID. Going after all the people the boy felt an unexpressed rage towards.
Originally, Johnny Depp wanted to wear prosthetics in the role of Ichabod Crane, with big ears and a long nose as Crane is described in the original story. But director Tim Burton thought it would be funnier if Depp remained handsome as he was and act like a total wimp.
(Crane faints at least 5 times in the movie)
Actor, Eric Stoltz was the original Marty McFly. He worked on the film for about 5 weeks before he was let go by director Robert Zemeckis, who said that as good as Stoltz was, his comedy timing was off. The studio agreed to his decision and Michael J. Fox was brought in. Fox was busy filming episodes of “Family Ties” and had to severely allergies schedule just so he could play the part of Marty McFly.