According to a merchandise banner on display at the BBC's table at the London Toy Fair, Doctor Who will air the remainder 8 episodes of this season and then the 50th Anniversary in the fall. There is no mention of a Christmas special nor any season 8 airing at all in 2013. To top this off, the anniversary special is 60 minutes long and not a season long celebration as hoped. The Banner also mentions the docu-drama and 11 other documentary specials.
Now the banner does say "To Include" and so there may be more to be announced but if that is it then this anniversary may not be as big as originally thought.