Self loathing...
I shall probably hate myself for doing it, but I can't see me holding out until November, when I know perfectly well there's already a version I could be holding, stroking, watching, and pampering.
Yes, they're clever, cynical, marketing wizards -- but we all know what they're doing, it's just that we don't care enough not to play along!! And personally, having already paid to see it in the cinema several times, the first DVD set is only equivalent to doing that three times anyway, and I can guarantee that I shall watch it more often than that in the interim. And besides, the extras will be different, the additional footage a more interesting comparison once I know the whole film backwards, and it was that good, I don't mind them having the money.
The biggest incentive of all though, is that the two of them will take up even more space on the shelf...
Dunx.