Right, I see where you are all coming from.
I wouldn't consider that a constraint, but more of a challenge to the corps to out perform the 12 other corps that are playing the same theme! I'm pretty sure we have witnessed multiple corps playing the same show during the same year and neither corps got the same results. I think it will be a challenge to the design teams and staff(s) to come up with the show that stands out from the others. Just think of it; Blue Devils, Phantom, and Cavaliers playing the same show, each of those corps has a different style; BD in your face, Cavies all over the place, and PR with the epicness. There is no way the 12 corps will look or even sound the same.