Just wanted to throw some info. I've completed the MK9 tower which is still available to everyone to play until Sunday night. It is a 14 matches tower that features most of the MK9 characters that were returning to MKX. The thing is that after like the 11th battle or so, the matches are start to become really hard, as it's like that at stage 1 it's really easy, and it becomes harder and harder until the final match. I did manage to get to the 13th match against Sub-Zero and I did beat him and even did Reptile's secret Brutality on him, but I barely managed to do that. And on the final match, which was ironically a mirror match against Reptile, I got my one and only loss, but after that loss the AI's Reptile seemed to be much easier to fight against, which means that the more times you lose, the more the difficulty drops.
So in short, if you want a challenge, make sure to go to the MK9 tower and not to lose a single fight.
As for me, well, it took me up to the final match just to get one lose and after that I've beating the whole thing, so it clearly was awesome for a first time
