A couple of minor points to make about your post. Photographic images of this kind from the early 1860s are unusal. Only skilled photographers like Alexander Gardner and others working for Mathew Brady attempted to capture scenes like this. Outside of studio portraits (much easier to produce) and a few outdoor images taken in 1861, images made by Southerners are virtually non-existant.
None of the brigades reviewed at Demopolis had ever served with the Army of Tennessee. The two brigades which had belonged to McCown's Division returned before the Battle of Chickamauga. Also, Carter Stevenson's Division belonged to Kirby Smith's command prior to being ordered to Mississippi, not Bragg's. Actually McCown's Division appears on AoT orders of battle as the 2nd Division of Kirby Smith's Corps.
Detailed accounts of the review appeared in the Selma Morning Reporter. Let me know if you would like to see these.