Im going to make 2 predictions in this thread based on two things. 1. January is Draenei month, and it would make sense for the next one to be Blood elf. 2. Patch 6.1 for WoW is due out in February or March with new Belf models.
I am predicting that Februarys card back will be Blood elf. There may be a cross promotion during this month.
I am also predicting that 6.1 will launch in February instead of March.