Very cool, Bill! I thought at first that you were channeling Rossini, who it is said would yank arias wholesale out of his previous works when he knew his next premiere was in a town that hadn't heard the previous use of the tune. But when I rechecked the intro of one of my favorite Kersten opuses, I found that I was wrong; similar, but clearly different. I like 'em both.
On the subject of the Goldsmith Universal fanfare, I just heard an interview with the great LA studio French hornist Jim Thatcher wherein he talks about playing on that track. He relates that he played Wagner tuba on it. When queried if being stuck with the tuben part was the fate of the last hornist to show up for the session, he declared, "No way!" Honking a few bars on the tuben earns the player 50% premium pay as a doubler. The hornists always try to talk the composers into using Wagner tubas for a lick or two.