I see this stated a lot on forums and it's close, but not 100% accurate. Ptolus is indeed not a "special edition" of some other book. It is the book. There won't be a "trimmed down" or a "even more deluxe" version later. Frankly, I wouldn't know how to realistically do either option anyway.
However, unless it was after a long night of drinking with Mel Gibson one night, I'm pretty sure I've never stated that there will be only one printing. That said, I don't think there will be additional printings, because demand would have to be extraordinarily high to make it worth it (this is an expensive book to print, as you can imagine). Publishers try to gauge accurately what the demand for a book will be and print exactly that number. It's a costly mistake to do otherwise, because two print runs of 10,000 copies each (for example) costs much more than a single print run of 20,000 units of any book.
So if Ptolus does go to a second printing, don't mock me for doing something I said I wouldn't do. Mock me for guessing wrong. I usually keep a policy of never say never (when possible or appropriate) and in this case I have indeed never said never.
Thanks to those of you who said nice things. All I can say is, just wait until you actually see the book for real! I'm very excited for people to finally see it.