Question: what movies are coming out on december 21?
Answer: Aquaman. Aquaman is the king of Atlantis, born half-human as Arthur Curry and half-Atlantean. ...  Bumblebee. On the run in the year 1987, Bumblebee finds refuge in a junkyard in a small Californian beach town. ...  Welcome to Marwen. ...  Second Act. ...  Bird Box. ...  105 mins. ...  Between Worlds. ...  Cold War.