You need to be prepared for no codes being available. Just because they have been available before, doesn't mean that they will always be around. If Disney doesn't see a lot of empty rooms in its inventory, it doesn't need to offer codes.
Now, that being said, it's entirely possible that *IF* codes come out, you might not see them until mid-December. I remember last year, the codes came out in early November, but the AP rates didn't coem out until mid- December. We could be seeing that situation this year with codes.
The other possibility is DIsney is still trying to fill pre-Xmas rooms. There is an active code out for rooms Dec 1-25 check-ins. But it expires after tomorrow. Perhaps we'll see January codes immediately on Sunday.
But Disney's pattern this year has been to leave time between one code expiring and another one activating. Anywhere from a couple days to 2 or 3 weeks.
Just keep watching the boards. If codes are gonna come out, somebody here knows it ahead of time and gives us allt he heads-up. Unfortunately, right now it's a waiting game.