They could release the "Giant Claw" as an A/B disc... you could program the DVD player to play either the original effects, or the upgraded version... (something you can do on the "Dr. Who: Dalek Invasion of Earth" DVD, with William Hartnell. They replaced some pie-plate flying saucer shots with some pretty god CGI ships.) ...too bad the title isn't in public domain, I'd be tempted to try this.