There were a couple comments about it in 52's discussion thread and with the former volume out I think it's time to create a new one. Place any predictions or ideas for the volume in this thread if you have them.
Personal Prediction:
-Title: A King's Disposition (though "Adventure on an Island of Women" would work too)
-Color: Some shade of green (works for some society like that)
-Chapters: 513-522
-Cover Image: Somehow I sort of imagine something similar from the first Thriller Bark volume: Luffy running for his life from a horde of Kuja, with Marguerette, Sweet Pea & Aphredelia prominent among them. At the top, we see Hancock in her "Mero Mero Mellow" pose with Sandersonia and Marigold, one on each side of her.