This sounds good, I hope it's true.
Top happiness: Reiko and Sareena.
Nice to see you return: Havik and Quan Chi.
Curious: Daegon and Taven/Shinnok.
Look, that weird Taven/Shinnok could be worked into this variation system. Maybe it would allow Taven to have a moveset more leaned to Shinnok's side, or more to his own.
Seeing Reiko, Sareena and Quan Chi coming back allied with D'Vorah makes me think this is a good opportunity to have a story somehow centered around the Brotherhood of the Shadow.
Quan Chi fucking angry at Shinnok and probably wanting to kill him is basically MK4 Quan Chi and I love that.
In this whole time-travel mess, Reiko could be like "fuck everything!" and he probably wants to kill Kitana to claim the Kahn's helmet (and power lol)
Let's see what happens.
Oh, and Rambo.... yes, that's something NRS would absolutely do. This is probably the legiest thing in this leak.