While the flashy words grab my primitive monkey brain and make me want to fight the alpha male for this, the modern, human part of my brain says "but is it any good?"
I could probably write a computer program, using my lame understadning of BASIC and PASCAL, that would churn out 1,000,000 words, 100 maps, and stamp a $99 price tag on the cover. I guess they're selling to the retailers when they tout the fact that it's going to be the most expensive d20 book ever, but how is that supposed to impress the end user? prestige? I'll wait for the reviews, but with a title like "world's largest dungeon" I'm not expecting much.
I don't usually make harsh comments like this, but wow.