Quick Mortal Kombat X update from Warner Bros
"NetherRealm Studios is developing new downloadable content (DLC) for Mortal Kombat™ X, The new content will include new playable characters, skins and a new environment, all of which will be available in the first half of 2016."
No video teases with this announcement, but it's been rumored for a while now that Rain, Sindel, Nightwolf, and other characters who are already full modeled and fightable in the story mode of the game will be added to the multiplayer just like Tanya was with the last wave of DLC.
Nobody knows who it's coming down the line, but there are rumors galore already. Who do you want it to be? My vote goes to Bo Rai Cho!