Have you gotten any of the Mobile unlocks yet? There's an exploit that Lord Greyjoy exposed on several threads today. Basically, you go to the Ranked vs Player leaderboards, and look for the #46 ranked person (GrumpySenpai is what you're looking for, and his Ranked vs Player main should be Kitana), and download that guy's profile. You should get some Kombat Kard pieces, as well as Klassic Kitana, Farmer Jax, and Injustice Scorpion. I'm not sure if you get Ninja Mime Johnny Cage though, and I can't konfirm or deny it either way because I already have Ninja Mime Johnny Cage. I wanted that Klassic Kitana badly.
But next time you go on MKX, I advise you to hurry and do this, because this may be patched out.