Considering how long it's taking just for the first balance patch, don't expect new variations any time soon.
I honestly still can't believe the game released with only 2 variations, many of which are completely useless. At least you knew what the purpose of the variations were in MKX. I look at Cage's 2nd variation with the sunglasses and the stupid camera and I'm just like.....what is this shit?
I honestly don't foresee NRS adding more variations until sometime next year. The majority of the ones they have now seemed to be just thrown together, so I don't have high hopes for the new ones, either, if they come at all.