The BBC have released a short synopsis for Last Christmas the 2014 Christmas Special. This special looks to me like its going to be a bit like The Thing the movie from the 80's not the 50's version. Plus don't forget Santa will swoop in and save the day keeping the story festive.
“The Doctor and Clara face their Last Christmas. Trapped on an Arctic base, under attack from terrifying creatures, who are you going to call? Santa Claus!”