As a level Colonel 120 in BF4 and I follow all BF4 information, including the Premium calander, the offical description for Dragon's Teeth is as follows:
"Experience all-out urban warfare in new multiplayer maps taking place in war-torn cities locked down by the Chinese army."
Dragon's Teeth is going to be urban environments, mostly CQC, and a movable tactical shield has been confirmed for the DLC by DICE.
Also, every DLC comes with a game mode, so expect a CQC kind of game mode in Dragon's Teeth.