Review by EvanoOruvan

It's just like taking the concept of The Great wall movie and adding time travel to it ( with lot of plot holes related to the time travel concept itself).

There are so many questions that arises in my mind but asking them would be spoiling but one question (without spoiling), if most of the present people are dead in the war, how would their grand children be born to fight the future??? Or if it is an alternate timeline, how would the second or third or fourth wave of travellers will go to the an alternate timeline???