1/10.
So we know 15 characters: Geras, Raiden, Skarlet, Scorpion, Sub-Zero, Sonya, Liu Kagn, Baraka, Kano, Kabal, Johnny Cage, Cassie, D'vorah, Erron Black. Logically Kotal Kahn.
The TYM most wanted roster actually looks pretty good IN THIS MOMENT. For the rest 8 unrevealed roster places (cause it's pretty certain Kitana and Kung Lao are in) we'd have Rain, Noob, Jade, Fujin, Havik, Sareena, Smoke, Shang Tsung + Mileena as DLC.
I think we'd all be happy with that roster. But you know that in those 8 we're gonna get the other kombat kids and 2-3 new characters. So it will suck.
Even if we are very optimistic and we count 2 big packs of 6 DLC each (where I expect there will be 3 guest characters and 3 MK characters in each) that will make just 6 more MK character spots, which I expect to be occupied by more MK 3 characters like Kabal (Nightwolf, Sindel, Reptile, Jax, 1 cyborg).
That will mean of the above voted Rain, Noob, Jade, Fujin, Havik, Sareena, Smoke, Shang Tsung and Mileena only 3-5 will make it, the rest will stay out, needless to talk about Reiko or Tanya or Frost or Ashrah.
That's why I say the 25 roster is just horrible and characters like Kano and Sonya would have better been left out.