The following news is almost as sad as when Daniel Jackson died that one time in Stargate SG-1, the plans of rebooting the Stargate film has been canceled.
A few years ago when Roland Emmerich and producer Dean Devlin planned on making Independence Day 2, they also revealed that they had plans on rebooting the beloved sci-fi movie Stargate and even create a trilogy out of it. The plan was to follow up on the original plans they had for the original film from 1994 and to be able to envision their ideas they had to make a reboot. But the powers that be, be it the guiding hand of the Ancients, the corrupt word of Origin, or the lies of the Goa'uld, decided that the reboot was not meant to be.
When speaking with Empire Devlin said that things were going according to plan, but then it didn't anymore and that it all fell apart.
"It looked good for a couple of months, but now it’s not looking so good. There are just a lot of things that have to fire at the same time, and there was a moment where I thought it was all firing at the same time, and then it all kind of fell apart."
Another factor is that Devlin dislikes working with big studios and they were too fixated on numbers and the idea of creating a franchise. He was also afraid of ruining the franchise for longtime fans, and that a reboot might be hated by those who have been fans since the beginning and made the Stargate name into what it is today. The first Stargate film was made independently which might be one of the reasons it became what it did.
"It’s one of the reasons I prefer to work independently. Listen, I think if we did Stargate right, the fans would like it and we could do something really good. But if we screw it up, they’ll reject it. As they should. But I kind of don’t want to do it if I think that we’ll screw it up, and that’s one of the things that’s holding us back."
Collider.com also speculates that the box office flop of Independence Day: Resurgence might be another reason for a new Stargate film being put on ice. It also might be possible that many studios don't trust Devlin and Emmerich to reboot yet another classic 90's sci-fi franchise, and that it would be too risky for the studio. Big tier studios would most likely demand a lot of creative control, which goes against the independent thinking that Devlin aspires to.
Maybe it is for the best that Stargate remains what it is, unchanged.