The logical reasoning behind this seems to be having the disc in digibook format more prominently displayed as a "recent release." Many of the buyers for multiple stores that carry Patton probably won't even realize that Patton has been released before, see it on their "new release" sheets and order it for stock. They may have a couple of the older discs still on the shelf, but the new digibook will be prominently displayed in places like Best Buy for Memorial Day as if it were any other new disc. Deceptive? Maybe. It is a new release. A new re-release in new packaging.
Most retail chains (and probably many online stores) didn't even realize when Gladiator had been remastered and restocked on the shelf. When I exchanged my copy at Best Buy, the customer service person didn't even know about the exchange or the fact that the discs they had in stock had been remastered from the ones they had only a week previously. Once the BB employee looked up the exchange program online, I was able to get the new disc. The same happened with the audio synch mastering error on Saving Private Ryan. The packaging was and is identical, except for the "yellowed" bar code, something the average buyer would never even know or care about.
Fox will likely handle Patton's fall remaster the same way, with the exception of probably not offering an exchange program. If you want the new disc, you'll likely have to buy it. With Gladiator, Paramount replaced the disc very quickly after the online firestorm about its transfer. I can't see Fox doing the same thing a couple years after the initial release.