I’ve heard rumours about Onaga making a comeback. Shujinko also exists in the reboot timeline cos he was in the MKX prequel comic (as well as Daegon; Armageddon again?). Don’t know if that means his quest to gather the Kamidogu is complete, cos the events of MK9 likely would have interrupted that, but it certainly seems like things are building up to Onaga.
Edit: I just remembered the kamidogu played a MAJOR role in the comic. Raiden was giving them to Earthrealm Warriors like Scorpion, Sub Zero and Shujinko to protect and Havik used some magic or something to corrupt people through the Kamidogu to satisfy his hunger for chaos before they “killed” him in the end (no way he’s dead though). Definitely some Onaga stuff going down soon