I'm a bit scared devs just generated misunderstood/misinterpretation and fucked off this idea .... sort of you can have unlockables characters, but, kinda like MK9 secret battles : like you unlocked klassic smoke, klassic reptile , etc only through secret battles and only to fight against them, not with / using them, and so, when devs says "unlockables" , they wanted to say "secret unlockables fights" not in the story mode grrr
.... hope to be wrong and , indeed , there are real unlockables MK11 "playable" characters to be used, and not false "unlockables" only acessible by doing some stuff and having them revelead , but as NPC secret fights .... I know devs said they could not repeat that Rain / Sindel NPC non-playable shit stuff in MK11, but, I'm little skeptical ... I dunno if will end being true 100% ....