Cassie Cage, her powers and the revenants.

[TehPredator]

Raiden has taken a darker route after cleansing the Jensei. And basically threatening Liu Kang and Kitana that he will basically kill anyone and anything that dares threaten Earthrealm. This could range from multiple different areas such as killing evil characters to good if they decided to make a move against Earthrealm.

I'd like to direct your attention to Raiden's ending in Deception. He brutally kills a good guy, Shujinko, because his actions threatened Earthrealm. This is what Raiden's sole purpose is now. He may not technically be evil, but if he slays someone that's good, then he does have evil tendencies within him.

So in a way, yes he is evil.

I think he's more of an anti-hero.

He might just make more revenants.

So yeah, now I see why raiden might not do it.

 

[Jacqui Briggs]

There's no way they're going to stay villains for long. It's about the same as Hulk Hogan turning heel and joining the NWO back in the WCW Nitro days, it's all kayfabe, a gambit to freshen up the storylines of long standing characters. They may reside on evil street now, but check back after MK11 and they'll be elsewhere...Repentance Avenue. That's where thing are going to get real interesting. For instance, will the new heroes accept them back into their ranks when it's all said and done and they're somewhat back to normal? maybe...maybe not.

And as far as "enjoying" their revenant status, they have no choice but to enjoy it, Quan Chi not only resurrected them, he twisted their minds (as stated in Quan Chi's reveal trailer) and altered their perspective to drive them into darkness, so therefore they are not themselves at all, like when Green Lantern went evil for a while, or almost all the major DC heroes during the Darkest Night saga.

This I can agree with. I personally would like Kitana to either become a villainous "not the kind that just wants to destroy everything, but the type that's out for herself. Think Emma Frost during her Hellfire Club days" or to be a anti hero. I don't want her going back to being just another goody good. Kitana has the personality to be so much more. Liu Kang however can go back to being Raiden's protege

 

[the_pathfinder]

This I can agree with. I personally would like Kitana to either become a villainous "not the kind that just wants to destroy everything, but the type that's out for herself. Think Emma Frost during her Hellfire Club days" or to be a anti hero. I don't want her going back to being just another goody good. Kitana has the personality to be so much more. Liu Kang however can go back to being Raiden's protege

I can definitely see Kitana becoming more of pragmatic anti-heroine in her post-revenant days, kind of like the "heroes" in Frank Miler's Sin City where she blatantly disregards any rules, morals or by-laws to destroy any threat to her, her allies or her people with extreme prejudice.

Liu Kang going back to being Raiden's protégé, however, is most likely not going to happen. Liu Kang may either return to the shaolin and spend the rest of his life crying in the temple, helping the new guys out, or he'll just join Kitana wherever she may be (be it Edenia or Outworld). But go back to Raiden? I don't think anybody will want to be anywhere near Raiden during and after his GrimDark phase, he may not even be the protector anymore after the dust settles.