Latest Drone pic in this link. This thing IS huge - no doubt. The cement work that has been completed in this picture is 50K square feet for context.
They are saying most of the cement slab, elevator shafts (you can see those on the left side of the picture) steel work will begin, and the walls on the short sides will be complete before month's end.
http://phoenixmart.com/its-going-to-be-huge/