I know that previous games have been leaked before, but I take all individual "leaks" with a grain of salt.
It's always funny to me how someone always has a brother's, cousin's, roommate's, uncle's friend who used to walk Ed Boon's dog and has insider information on the next MK or Injustice game.
There was another dude, who, before Klassic Ermac dropped on MKX mobile, had reported to have worked at NRS and stated that Shang Tsung would be the next character to be on MKX mobile (never happened), and that there would be a reveal for the next MK console game on Halloween (also never happened).
Again, I'm just saying that until I see an official trailer with characters shown or NRS shows a demo it's all just something that I take lightly.