In 1990, a script was written for the sequel, it involved the cast of the first film going to Hawaii. Burton & and the cast were set to return, but the cast would only come if Burton was involved. He became to busy with batman returns and eventually gave up on the idea. The script it still owned by The Geffen Film Company till this day. See more...
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Continuity: When Otho is calling the spirits of Barbara and Adam to return we see Barbara first, suspended above the table in her wedding gown. She "ages" so rapidly during Otho's chant that her skin shrivels and her feet curl up, causing one of her shoes to fall off onto the table. A few minutes later we see a long shot of both Barbara and Adam suspended above the table, but her shoes are both on and there is nothing on the table.
Revealing: When Barbara and Adam are digging up Beetlejuice's grave, you can see that a piece of cardboard states "FRAGILE" or something in small print which is proportional to Barbara and Adam at that time. However, the lettering should be ten times larger if the cardboard was proportional to the actual model.