IF Havik, Ermac and Quan Chi returns, my idea is that Havik wanting too screw Quan Chi, he finds Ermac and opens and frees his mind from all forms of control and giving his free will back. And Tells Jerrod's soul that within Ermac, that Quan Chi had brainwashed Sindel and was involve in helping her betray him and helps Shao Kahn to get the Edenia throne and use Sindel's death to have a bypass to overtake the Earth without using Mortal Kombat.

Havik is a Cleric of Chaos. So I would have him flow between Chaotic Good, Chaotic Neutral, and Chaotic Evil within MK11 due to that he loves Free will, Pure Chaos and Striving. Havik practices a Form of Chaos Magick that allows him to manipulate his body in strange forms(think MKD) and able to heal himself as well and caste illusions as well. Chaos Magick will allow him to mimic other characters's abilities and Amps them to have total different effects that in the Spirit of Chaos.

Shujinko would make a return, Similar to Havik, he knows Chaos Magick. His core abilities stem from White Lotus, Lin Kuei, Shirai Ryu and Black Dragon due to his training with them.