Is it possible that Liu Kang could be one of the characters to use Kryptonite or anything magical against him?

No, because we never got any other DC references, since Mortal Kombat vs. DC Universe. So, I doubt it.

What if Liu Kang used his second fatality against him? The one while he was in space?

Eh, Superman is strong enough to take the most powerful hits ever. Wouldn’t matter, really.

I just want to let you know, I chose this matchup because they are both the invincible characters of their Earths.

Yeah, but Liu Kang still seems slightly inexperienced as a god. He became a god in MK11, and still is one in MK1. But I think he’s still slightly inexperienced as a god.

Currently, but eventually?

All I can say is: “Expect the unexpected.” 👍

Can you think of a new matchup for this site?

I sure can! 👍