Chill homeslices... Tanya is going to come back. There's like 24 slots based on the leaked image. But Boon himself says this will be the biggest roster of all MK games- Armageddon had what, 64? Unless Boon also includes variations as "characters", that'd be a total dickhead move. Tanya, without a question- she's Shinnok's little snitch and side piece... My dude smart, he knows that a ghetto girl got big dreams lol...
http://www.onlysp.com/mortal-combat-x-include-largest-roster-yet/
So based on the roster, let's assume each variant is a fighter. That makes 72 playable variants. We have Raiden, Kano, D'Vorah, Ferra/Torr, Scorpion, Sub Zero, Quan Chi, Kitana, Kung Lao. Leave spots for likelies- Kenshi, Ermac, Reptile, Shinnok. You get the remainder- Sareena (Quan's little friend with benefits is most likely gonna be in), Ashrah & Noob Saibot (it's a Netherrealm based game), Kai (token black guy), Sektor, Tanya, Smoke. Leaves room for four new characters, Takeda being one of them. Not to mention, Johnny Cage, Sonya, Kobra, Kira, Cyrax, Jax, Havik, all making cameos in story mode. I think there will be a bunch of NPC's that you'll have to fight. Moral of the story is calm your junk, your girl is probably gonna be in simply because she's part of the Shinnok/Quan Chi/Netherrealm story.