I'm gonna go back on topic with Shinnok with focus on the story and not competitive play...
MK9 is MK 1, 2 and 3 combined with a brilliantly written story that allowed them to "start over". I think it makes sense to show Shinnok for the next game but that also raises a more important question... Is this where NR chooses to completely avoid later titles like Deadly Alliance, Deception and Armageddon? Although I honestly enjoyed these games because I'm an MK fanboy, I admittedly do not enjoy the route that the story went. Ashrah, Hsu Hao and Kobra are examples of characters that I felt didn't fit in AT ALL. I really hope they take advantage of this altered past so that we may play through a more focused future. Quan Chi makes an appearance in MK9 but his role isn't important until MK4 really. Needless to say, Shinnok making an appearance with Quan Chi already here is going to make an epic sequel for sure.