In the third and final film, Army of Darkness, Ash (Bruce Campbell) has accidentally wound up in medieval times and just wants to get back to the present. Unsurprisingly, he winds up in a massive battle with the undead.
The Ending We Got:
After retrieving the Necronomicon, Ash uses a spell to finally go back to his own time, where he reclaims his job as a cashier at a department store. The film ends with one final attack by a possessed woman that involves a trampoline, a shotgun and a few last quips. It's a perfect, goofy, B-movie ending to the trilogy.
And just like that, Bruce Campbell earned cultural immortality.
What Did We Almost Get Instead?
In the original ending (and the one that persists as the official ending in versions of the film seen outside the U.S.), instead of using the Necronomicon, Ash is given a magic potion that will allow him to sleep for a century for every drop he drinks. Ash manages to mess up the count and drinks one drop too many.
This means, instead of waking up back home, he finds himself alone, in the ruins of some kind of apocalypse. He screams in anguish and ... then the movie ends: