Who cares about fatalities. Everyone hated them in MK9 so much and now you are bitching because they won't be here if Scorpion is in? Plus it's not like it isn't anything they can't put in a super. What moves would he have that wouldn't work in Injustice? The Spear? Takedown? All of it would be fine in a T rated game. It was all there in MK vs. DC.
Seriously? Fatalities are the trademark of MK, even if they get old quick they are the game's big thing. Every MK had them, even that abomination called MK VS DC...Then Injustice 2 shoudn't even feature Super Moves because they get old quick
So now let's examine Scorpion's moveset
1.Spear, Batman has it already
2. Leg Takedown, same as above
3.Teleport Punch, would not work for obvious reasons
4.Air Grab, this game doesn't have air grabs, unless they do it as a command grab
Only the Hellfire move would work and some characters already have similar moves. What are they gonna do give him new moves? Then he won't be Scorpion