The Great Wall (Blu-ray release 2017-5-23) is a monster movie in which European mercenaries help Chinese to fight monsters at the Great Wall.  Individual CG action sequences are good enough, but the main story is dull without any surprise or depth.  Simply saying the monsters were sent by god to punish people’s greed is neither a good nor sufficient background.  There is too little attempt to make the whole thing believable, with a suicidal and ineffective means of combating the monsters showcased early, and what happened to the monsters at the end.  The movie also wastes some of the top Asian cast by having them doing almost nothing.