It seems the original Stargate — co-created by the Independence Day team of Roland Emmerich and Dean Devlin — was always intended as a trilogy. And as Devlin tells Variety, the series must be rebooted to tell that story.
The 1994 film, about an archaeologist who discovers a portal to another world, starred James Spader and Kurt Russell and went to box office success and a group of spinoff television shows and TV movies. Sadly, as Emmerich and Devlin went off to make Independence Day, the TV shows were developed without their input and disregarded their feature plans.
But now they're back and Devlin says they intend to finish their trilogy. There is one catch, however. Unlike Independence Day: Resurgence, the Stargate sequel cannot take place twenty years later. So, according to Devlin, "the only way to really tell that trilogy is to go back from the beginning and start the story all over again."
He also mentioned the studio, MGM, is eyeing Stargate for its cinematic universe potential. Considering the way the three shows, Stargate SG-1, Stargate Atlantis, and Stargate Universe expanded the breadth of stories that could be told from Earth's lone portal to a larger reality, it is certainly ripe for exploration as an ongoing feature film setting.
In fact, thinking about the original Stargate, it ends up feeling like a pilot anyway.