Let's be honest if MK15 had everything MK9 had and better there will still be hot threads like this of old schoolers saying "yep, they where the days, I wish we had them days back"
For most players here it's the game they lost their virginity too, their first love
Was the sex great, yes it was the first time releasing the pipe but was as great as you remembered probably not, will you have better for sure, but you are always going to look back at those days as the best days no matter what.
That's my take
Hell will happen to MKX too by then the time will pass the bullshit will blur away the bad times will be forgetting the better the times will be remembered, people will miss them etc etc
There is actually a name for this phenomenon I'll edit it when I remember.
For the record I think MK9 was a fundamentally more sounder game because it was more safe in execution.