One thing I never thought about with the intro is that, at the time it was produced, the ISS didn't look like how they represent it, but now it does look pretty close to it. They must have gotten some idea from NASA of how it would probably turn out to look.
They used the original plans and artist drawings for Freedom which became the basis of the ISS for the intro, the ISS was about half way with being completed when Enteeprise got pull off the air and when it first aired the ISS had only 3 modules.
