It will be very much along the same lines as my other Playroom Oracles: Oz and Golli. I don't know yet when it will be available, although a Christmas release seems most appropriate. The number of cards will be decided in the making. My sense is that there won't be as many as in the other two decks simply because the volume of available art isn't there. Palmer Cox has a large body of work, but it isn't all Brownie-related. On the other hand, his drawings are so packed with action and with so many Brownies that it's very possible a single illustration could make for more than one card.
My source materials include three obscure early volumes of Cox artwork and stories. Although they bear the same title and are ostensibly the same book, the content varies greatly between each edition.
I have at least three other decks of various kinds that are in the early stages of process, but no one deck that is far enough along so that I can say "This one will be next."
Although I am phasing out any work with GameCrafter, a part of me wants to do this through them just so that it has the same look and feel as the other two decks. The other possibility is to declare the first editions of Oz and Golli "out of print," stop working with Game Crafter altogether and take everything to the new printer.
Meanwhile, the official release date (barring disaster) for the Punch Tarot is now May 2, and the Bordered edition of Il Lombardi Dannegiato will be available shortly after.
Thanks for asking!'