One question that perplexed me after MKA with the introduction of characters such as Argus, was where was he when Edenia was attacked and conquered by Shao Kahn? Or by Shinnok, after Tanya betrayed the realm? If he was suppose to be the Protector of Edenia, how come he didn't try to stop it like Raiden does for Earthrealm?

In real world, the answer can be easily given by the simple fact that the concept of Argus, as Protector of Edenia, didn't came way after Edenia was attacked and conquered by Shao Kahn. i.e. Mention of Shao Kahn conquest of Edenia (MK2) and Argus (MKA)

But how would one explain in game?

Also, now with MKX. While many would say MK2011 was a continuation from MKA, it was for the most part was a reboot of MK1-3, with couple of key differences. One key difference was the inclusion of what would normally be MK4 character into it. i.e. Quan Chi. One of the reason, it was because it made sense, since Quan Chi was behind the scene during the events of MK1-3, we just haven't been introduce to him yet until MKSZ and MK4.

So should we expect the same for Argus for MKX? Especially how Edenia now is left without a ruler.