I was using Sheeva in online matches (she's my third main, second in MK11 since there's no Reptile) and when fighting Skarlet something she said in the intro got me thinking, She called Sheeva a "Sub-Zaterran mongrel" to which Sheeva replied: "Sub-Zaterran?" It seems that Skarlet knows something about the Shokan that the Shokan themselves are unaware of.
For those that don't know, the Shokan have dragon blood, which is why they are compatible with Onaga, Goro even becoming Onaga's vessel. They are also a subterranean society so when Shao Khan conquered Zaterra they may have been unaware of it. Reptile, the main Zaterran we know of is also compatible with Onaga as we saw in the old timeline.
Here's the question: What if Zaterra is Onaga's birthplace and that's why Shao Khan conquered it as soon as he became Khan? Zaterra may have been the home of many Reptilian races like the Saurians, Dragons, Shokan, etc. Do you all think that the Shokan were originally from Zaterra? Or that Onaga was Zaterran?