My idea for rebooting Stargate was to reboot it in the 1940's instead of the present. Similar to the episode The Torment of Tantalus, but this time they figured out how to use the stargate properly. I think that this could lead to interesting stories, or at least some cool stuff (death gliders vs. Spitfires!).
I once had an idea that the U.S. was able to activate their stargate during the Cold War era, and then the Soviets discovered the Beta Gate in Antarctica and started up their own program, continuing the Cold War into the galaxy. But that would have probably required some rejigging of the 'laws' of stargate travel, since IIRC the Americans couldn't activate their gate while the Russians were using theirs.
Anyway, it's probably not enough to sustain a series, but it could make for a neat AU miniseries, novel, or comic book.