As Mortal Kombat 1 kicks off, fans are basking in a new era. Liu Kang, as the Fire God, has reshaped reality, but he's stunned to learn all isn't as it seems. There's a Titan version of Shang Tsung running loose as well, making incursions and looking to shatter this paradise. The iconic villain doesn't like anyone but him messing with space and time, so he wants to enslave all timelines, beginning with Liu Kang's.
Source:https://www.cbr.com/mortal-kombat-1-raiden-ending-explained/