While Beetlejuice has its share of dark moments it’s still a comedy at heart, so ending the movie with Lydia’s death would have been an unnecessary downer.
The project spent several years in development hell, by which point most of the key players had lost interest.
While the success of the movie spawned a long-running cartoon series, a sequel never arrived.
While Beetlejuice Goes Hawaiian didn’t ultimately happen, there was revived talk of a sequel in recent years.