I really doubt it. Why pay for a product if you're only going to use 1/6 to 1/10 of it? Especially given the antipathy many gamers feel for at least one setting, I really, really doubt it.
I mean, I'm a hater of a bunch of settings. I'd pay for a well-done Greyhawk book, but a book that was also full of stuff for the settings I consider to be crap? No chance. Hell, I've skipped products that were otherwise pretty cool because they had too much setting material for what I consider to be junk settings in the past. I don't think such an unfocused, diffuse product has a market