Like MGM's plastic slip-covers, WB, let's say, put out 100,000 of them. after that, there's no more. To me, this slip-cover isn't anything special. Just a waste of materials.

When WB switched from snapper case to keepcase, they changed the art work of The Shawshank Redemption, Chariots of Fire, Strangers on a Train and The Iron Giant. Those are the only ones I know of that has changed. Goodfellas, The Lost Boys, Gothika, North By Northwest and Blazing Saddles stayed the same.

They probably figured out something like, "OMG, hey, we don't have to change the artwork just because we are changing the cases. D'oh!"