After I finish my current mapping project - I'll be working on a fused Blackmoor & Greyhawk map using the maps from this link:

I'll then incorporate my own tweaks to it to be a bit more in line with the GH Folio maps in shape IF possible but with the locations of the Duchy of Ten located west of Blackmoor & the the Great Kingdom still intact. As I am doing this I'll be creating my own version of the fused setting with only those changes required to line up with both settings. There are a few canon things I am dropping - like a few deities (Al-Akbar & such) & adding a few new Baklunish ones.

Cool. You might be interested in my own, graphically challenged but factually accurate, attempt to merge the two. IIRC I also included some info from Quag Keep

I'm happy to send you the file I use IMC for the descriptions of various places - most of which my players will probably never get to. Just PM me if you want it. I tried to attach it below but docx wasn't allowed.

Edit: Since I made this post in 2017, I drew another, much better map:

How is this interesting project progressing?