-There are 2 fatalities, 3 pits and bone breakers and weapons are back

-Reptile is 100% confirmed, back in an outfit like his MK4 alternate

-Odis Kahn is a new guy in process. He is in cuz of "family issues"

-Scorpion is GONE because of Raiden sealing shut the Netherealm to prevent Onis

-Ash who is a character in the third film might make an appearance

-There will be a new special forces agent, Gemini, from MKSF

-Dairou who we had seen sketches of will make his deput

-Smoke may return as a secret character

-Characters will be digitazlied as before but in 3D environments

-The tournament is on Tsung's island so expect a lot of MK1 Arena remakes

So the confirmed characters are:

REPTILE
ODIS KAHN
ASH
DAIROU
GEMINI