Dave, there's no indications that there's going to be any problems with the disc itself. The original post was just wondering if something was wrong with production because it isn't available for pre-order while the other Superman films are.
My order for The Thing and Slither isn't scheduled to ship until next week. Bummer, as I was looking forward to watching these this weekend with Halloween approaching. I'll be picking up 12 Monkeys this week in stores, however. :)