The next game will probably have Great Kung Lao's story with a new retcon. This time he wins against Goro with FG Liu Kang's guidance, only for Onaga to possess the fallen Shokan prince, becoming reborn.
Plus Liutana will slowly reunite until the end of the game.
In order to give out the Avatar vibe, Liu, Fujin, Tremor & possibly Rain unite in the four elements.