Joe Dudeck came pretty close with this picture of the sanctuary.
In it you can see the stadium seating taking shape on the left and the right. Eventually the entire concrete floor will have a similar look. The remaining dirt area will be dug out to form a sloped floor seating area. There will be 900 seats in the dug out area and 900 in the stadium area. It will be remarkably intimate and yet seat a large crowd.
On March 20 there will be a tour available to anyone who is interested.