I have wanted to chime in, but I'm not as big a Shadowrun buff.
I am, however, a big Earthdawn buff, and I never saw it as a prelude to Shadowrun, for some of the reasons @Thenomain pointed out, and for a number of my own. It just seemed that was some sort of FASA concoction that was hard to believe, in the same vein as how the same accident that caused Daredevil's blindness also created the Teenage Mutant Ninja Turtles.
I'm somewhat fascinated by the concept of a less sprawled setting -- a place out of the city from which Runners launch their assaults. If modern terrorism has shown us anything aside from the terrifying things we will do to each other, it is that it is possible to wage war against a megalithic monstrosity from the borders and shadows. You don't have to be in Chicago to launch an attack on a Corporation located there; much of your prep work can be done through hacking from a remote location like Dayton just prior to a surgical strike from within.
Anyhow, I'd support efforts to make the game. It could be very interesting.
