If you are planning for 2014, I would book something pronto. We were at WDW around this time in 2012 and Thanksgiving dinner options slimmed out quickly because of the higher crowds and so many people were looking for a sit down dinner for the holiday. That being said, most of the restaurants keep their normal menu- at least from what I recall. Places like LTT go quickly as it's more traditional, but I think anything is fair game- so book- and book soon!