Including student(s) and local folk(s) in ceremony a very good idea. Another idea is to make it an awarding of the "The Purple Heart" (one of Rock's many medals of honor) instead of a promotion in rank. Lots of interesting possibilities here. I think the end of the official announcement needs to include a yell or cheer that everyone in the stands knows is coming:
"It is hereby declared that on this 15th day of November ... yatta yatta yatta ... GO LEATHERNECKS BEAT THE BISON" is a much too lame example
Whatever it is, it should be short, sweet, and very loud.
Maybe Reveille is not the right bugle call. If we can convince the VIPs to halt all tailgating before the game, Tatoo might be the proper bugle call to signal it, followed by a First Call and then an Assembly:
http://www.music.army.mil/music/buglecalls/
The Devil is in those details. All of this needs to be carefully orchestrated and immediately followed by the players returning to the field after receiving their final instructions from the coaches. Of course, the Band's playing of the National Anthem needs to be in there as well. No doubt there will be some occasions when the band and/or a live bugler is not present, so if it is to become any sort of tradition, we would always need a plan B:
http://www.ceremonialbugle.com/Products.htm