Just in case people haven't heard, the title changed officially as of today! Heard this through twitter and tumblr via Leigh Bardugo herself. This is the actual photo Leigh Bardugo posted on tumblr concerning this btw. I'm excited with this hint she has given about what the book will be about (if you go to her tumblr post about this, she explains a bit of the significance behind this title change).
But in a nutshell, apparently Six of Crows will deal with a particular crew that is a part of the Dregs gang--Kaz's crew from the looks of it.
*rubs hands together feeling intrigued*