I'm looking forward to seeing the picture too.
I took part in a similar guild BOM, but in my case we made two blocks each month, one from the fabrics that the quilt store provided, and another from our stash. We returned the block from our own fabrics to the quilt store, and at the end of the year the quilt store took all those blocks and put them together so that each person who finished the 12 months got a set of blocks that more or less matched, plus the blocks that they had made from the quilt store's fabrics. It was a fun project, and I would do it again.