Just wanted to put together a few thoughts.

I noticed a few saying Reptile could be playable in human form as seen in the recent trailer. Maybe or maybe not it is possible (I hope it is in the MK Chess Pit). The possible obstacle I see with that is however that Shujinko is still a young man. I don't know the exact time frame but for example by the time Shujinko is 60 then wouldn't Reptile appear as he did in MKDA?

It'd be cool if you meet Liu Kang prior to his death and prior to that Fujin or Nightwolf has prophesised it to you. You try to go and warn Liu Kang and then Raiden materialises in front of you and gives you the, "It's his destiny, you can not interfere" type lecture.

Again, all this occurs when Shujinko turns a certain age. I am not sure of the time difference between MKDA and MKD.

Anyway what I am getting at is all kinds of historical events could be witnessed between the ages of 13 and 65 and I wonder if this is what the developers intend also. That is, for you, the player, to witness crucial events in the history of MK.

Will you meet Kabal prior to his scarring?

Will you see Raiden when he was Evil? (as per MK1) and then see his transition into good or will it just be assumed Raiden was always good?

Sheeva prior to her death should be interesting but will you get a chance to affect the outcome or actually see it happen as part of the storyline?

Those that know the stories better than I can come up with heaps more.