AMC's The Walking Dead released more pictures to their Instagram showing images from the second half of season 7. I am going to try to group them so they shed a bit of light on 7B.
I am still believing in my "dump kids" theory. There is a picture from the first time AMC did an Instragram picture dump that hasn't shown up in the series yet. I also believe "Boots" is part of the "dump kids" camp.
"Dump Kids" Theory
There is a camp or group of survivors we haven't met yet that will become part of the coilition against Negan and the Saviors. These "dump kids" live in some sort of landfill or old scrap yard. There quality of living is not on par with Hilltop, The Kingdom, or Alexandria Safe Zone.