hi
i think that there are only 2 superunlockables. why? because in the main menu, when u hilight ,kontent, the krypt or mk online in the space that shows a mini video about the mode you want, it says the name of some realms and says fujin and stryker.
about netherealm:
when you go to the area where is quan-chi, go to the space where is the treasure. in the lava is a platform. wait for 8pm and you will see 2 guys in pose to fight in the platform. i dont know anything about this but i saw it.i complete konquest, so i dont know if them will appear in your game.close there are another platform bigger than the platform i saw the 2 guys, there are 3 characters, kabal, kira and kobra.when you defeat them there is nothing about kochal, only appears a portal that takes you to the city. i think that kochal is the name of the portal.dont enter to the portal and check if in another area is something interesting.
sorry about my lenguage if you dont understand,but im not of yours i only speak spanish but i try to write the things in english.
thanks.