What I gathered from most of the endings..
Raiden prevents Hanzo's suicide and sentences him to 'Life,' employs him and his clan to Outworld, defeats Kotal, and claims dominion over the realm. Kotal pleas to the gods for a fortification to the realm; creating a new Outworld Mortal Kombat. Raiden would then challenge Kotal, but would find that Bo'Rai'Cho has taken sides with Outworld.
Meanwhile, Johnny asks Jax to lead his team while he is hospitalize, and Jax accepts. He would later be escorting the team to a ship, where Erron would jump from the Cargo Bay. Jax would successfully defend them, but succumbs to the bullet in his chest, which Johnny gets word of and tells Sonya about shortly after she woke from a nightmare.
Later, Kenshi would take Takeda to search for his mother's killer. They would stumble upon the Red Dragon Clan, and eventually Taven. The three would unite and later encounter Daegon, killing him and avenging Takeda's mother and Taven's parents.
Kung Jin meanwhile would venture to the depths of the Netherrealm where he would find Kung Lao. Able to reach out to him and return hope to Kung Lao, they would return to the Wu Shi Academy where Kung Lao would train to stave off the evil that has long held dominion over him. Kung Jin would finally have his cousin back.
Peering back on old visions he had seen long ago, Raiden dispatches Cassie to hunt down and kill the returned Shang Tsung. Aware of the threat Shujinko would unleash, Raiden couldn't afford to take risks and deceptively targeted Shujinko as the weakened sorcerer. She would be successful in her hunt, but become enraged and distrustful of Raiden thereon.
Lastly, back at Outworld, Ermac's power would be diminishing as the real sorcerer Shang Tsung had returned to life, absorbing all the souls Ermac has consumed; among them being Shao Kahn's...
That's really all I have.
How did leatherface get through all special forces, he's just a deranged cannibal that could take a bunch of hits, but he's still a human. I'm wondering on how he even got into the mk universe he doesn't have that much power