I think a non-canon beat em up game will be nice similar to MKSM but with the MKX children. The story should take place during MKX and during the MKX comics.
Playable protagonists include Cassie, Jacqui, Takeda, and Kung Jin in all modes.
Unlockable characters in all modes include Li Mei, Sareena, Scorpion, Sub-Zero, Fujin, Kai, Kenshi, and Raiden. These characters are unlocked in story mode when finishing certain chapters of the game.
As the story mode progresses, players will have the option to change their characters based on who has been unlocked already.
Unlockable characters in all other modes except Story mode include D'Vorah, Kotal Kahn, Quan Chi, Ferra/Torr, Rain, Reptile, Ermac, Erron Black, Goro, Revenant Liu Kang, Revenant Kung Lao, Triborg, and Shinnok. These characters are unlocked after beating them in story mode.
NPC characters: The rest of the MKX roster except the guest characters. Characters from the MKX comics such as Skarlet, Mavado, Tasia, and Daegon. Also Revenant Jade, Revenant Stryker, Revenant Kabal, Revenant Smoke, Nitara, Hotaru, Revenant Nightwolf, Kira, Kobra, Motaro (revenant form and sub-boss), Noob Saibot, Kia, and Jataaka.
Corrupted Shinnok is the final boss.
All the NPCs will be opponents for at least one point of the story.
Weapons from some of the defeated opponents can be picked up used in a limited amount of time when found in a certain area such as fans (Kitana), sais (Mileena), knives (Kano and Kira), hookswords (Kabal and Mavado), Kali Sticks (Kobra), Naginata (Hotaru), Kwan Do (Sindel), Bo Staff (Jade), Jataaka's sword, Kia's throwing blade, Kobu Jutsu Tonfa Blades (Tanya), Tasia's swords, Stryker's baton, and other weapons as well.