In MKDA we heard, and saw the Dragon King's army which was supposed to have been undefeatable. We saw Shang Tsung taking souls and resurrecting some of the soldiers. I really at first thought the army was going to play a major role in MKDA, but it didn't.
With all the stuff we know about MKD we still haven't seen anything about the DK's army. The only thing we have seen thus far (which is still in theory) is Li Mei's costume may be a Dragon King army outfit. I'm sure all will be answered in the intro video, but I'd like to get some ideas from you.
My theory has to do with Raiden. Before the Deadly Alliance splits up they successfully reanimate the entire Dragon King army. Coinciding with the hatching of the great dragon egg, and the rebirth of the Dragon King the army begins to leave the temple, and starts destroying everything it comes across.
The remaining forces of good try to fight the army, but to no avail. Raiden decides to try to destroy the Dragon King in hopes of ending his tyranny, and returning his army to lifeless corpses. Raiden releases his god-like essence in a huge ethereal blast. The blast completely destroys the DK's army, but leaves the DK virtually untouched. The Dragon King now has to fight the forces of good himself, and enlists the aid of Baraka, Mileena, and a few others.
That is how my theory of the beginning of Deception will be. Just an idea, so feel free to post your own, or add to mine. I'm really interested in what everyone thinks about the undefeatable army. Post on!!