Ripley wouldn’t have appeared in any of the other Alien movies — heck, there might not have even been any more Alien movies.
Maybe, given Hollywood’s current penchant for what they deem “realistic” movies, Scott’s Alien ending might have been able to happen.
Sigourney Weaver’s Ellen Ripley lives to fight another day, and another alien, but the original ending that Ridley Scott suggested wasn’t nearly as upbeat.
The ending of Alien — one of the scariest movies of all time — isn’t exactly happy, but at least one of the members of the Nostromo crew survives.