So, I know you have around about 100 million irons in the fire now...and I know it's some time out, but I was thinking about "Into the Unknown".
I'm not at all certain how you are or want to do it, but I was wondering if you may be looking for some outside input regarding this supplement. If so, I'd like to recommend Sean Wills if you want a drop-in city of two (he had a short-lived Lulu product some years back inspired by the then-new 'one page dungeon' concept that was a short, 16-or-so-page affair with a handful of 'one page cities' that was called Cities of Swords & Sorcery I believe). If you like or want 'swords vs. Cthulhu'-type stuff then the fevered and imaginative force of Shane Mangus is someone who could/would likely contribute some solid stuff. Both of them are on G+ and one or both may be here. I'm not sure. If and when you may wish to avail yourself of their imaginatorium-ness I can easily get in touch with them if for some reason you're unable.
If you are (or will be) wanting to put the call out for contributions for content to fill "Into the Unknown" I'd even like to help, despite my lack of maps, notes and other things mortals consider essential. Ha!
My over-stuffed, too-big-for-its-britches town of Dirtwater is waiting, ephemeral though it may be, for the warping.
Of course, if "Into the Unknown" is something that is your vision alone then I'll shut up and simply look forward to its content.
Anyway. It was on my brain right now and I wanted to spew now so that I wouldn't forget later.
So, yeah. Cheers an' stuff.