MK11 timeline picks up where MKX left off.
The present- Kitana, Liu Kang, Kung Lao, Jade, and Kabal are revenant. Raiden has been tainted by Shinnok's amulet. Cassie, Jacqui, Johnny, and Sonya are still Special Forces. Scorpion is human and pretty much uses his real name. Sub Zero is grandmaster of Lin Kuei. Kotal Kahn rules Outworld.
Enter Kronika
Kronika has recruited past versions of most of the roster. If their past versions die, so do their present and future. If the future version dies, their past selves have a chance to choose a different destiny possibly preventing their demise. Pretty vindictive because it is done so they are pitted against themselves in an attempt to erase them from history, most importantly erase Raiden. She even pulls characters from the future (cyber Frost).
Kronika has meddles with the past, present, and future to reset what Raiden did from MK9 and MKX.