In that film, the actress played one-half of a deceased married couple. Alec Baldwin played her husband.
She then pondered where the characters might go in another film.
There have been a couple of rumblings about a proposed sequel. At one point it is said that there was a script titled "Beetlejuice goes Hawaiian," that was written by Jonathan Gems in the early 1990s. Nothing happened with that project.
After that, Warner Premiere was talking about doing a sequel exclusively for the home-video market. That also never materialized.
Beetlejuice was released March 30th, 1988 and stars Alec Baldwin, Geena Davis, Annie McEnroe, Maurice Page, Hugo Stanger, Michael Keaton, Rachel Mittelman, Catherine O'Hara. The film is directed by Tim Burton.