If that happens, it'd be a dedicated E-book. The demand's just not there and the potential for abuse is *huge*. So, it'd be pretty far down on the list.
That said, I have a few ideas that I'll be pitching upstairs after Xmas.
I promise, if you build it, we will buy it.
Well, too be fair, I can't really speak for everyone else. But I can promise I will buy it, and it will definitely help push my group into repeated Shadowrun campaigns over the next few years.
There aren't a lot of game systems that provide that level of customization. Most avoid it, because its dangerous both for balance within the current game and for later content. However, it is also really, really helpful to GMs with an interest in unusual campaigns, and as a result really helps replayability. It means I can use the system to run "Shadowrun", "Street-level Shadowrun", "Shadowrun: Desert Wars", "Shadowrun: Space Age", "ShadowMechRun", "Shadowrun: COPS", "Shadowrun: MARS", "ShadowStarcraft", "ShadowTerminator", *and* plenty of other silly but fun options.
Heck, if you make this, I'll buy it twice.