I do not mind seeing them brought back seeing as how they never got a second chance and no, I do not consider their eleventh hour inclusion in Armageddon as a "second chance".

Khameleon actually has a lot of potential story wise and I think it would be pretty dumb to not at least bring her back. Chameleon, meh, he can do with a name change. But one thing they both need are totally new moves. Or you can even make them one character.

Maybe give Khameleon the ability to also change gender and boom, there's Chameleon as her alternate. Silly yeah, but it's MK.

That's all I have. But I would like to see them back. I hate seeing characters like Khameleon in particular not given a chance.

There's no reason Khameleon can't come back with her own moveset.

As for Chameleon, I recently had a few brainstorms. If he ever did return, I'd more or less reimagine him as this amorphous blob-like creature a la John Carpenter's The Thing, which consumes others and takes on their appearance and abilities.

Shang tsung

I dont think they should have their own movesets because thats pretty much what makes them, them. But that is only for special moves, i agree they should have their own fighting style. I do wish they would make a decent story for them both. I never knew why Khameleon was invisible if she was Zaterran but it fits her. I make them a race all themselves that is distantly related to the Saurians, living on Zaterra. I know it was never said that Chameleon was Saurian, but it seems he would be.

Or pehaps they are just beings made using cells from all the ninjas in them, similar to Cell from DBZ. Also, as seen in another thread, it would be interesting to see a Cyber Chameleon, with abilities from the cyborgs that could look like this.
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Teleport - would be Sektors teleport with no punch. Its enhanced version would have the punch.
Net - Cyrax
Spear - not sure why im putting this, but Smokes move from mkii and umk3 copied from Scorpion. Dont have it look like the spear though, maybe like the net with a neon green coming out of his chest.
Smokeball - Smoke
Bomb or rocket - Cyrax or Sektor
Iceball - just maybe

I'll clarify: For plot purposes; so that Chameleon would have a good reason to have the moveset he does, instead of being a horrible piece of crap who has them all because n1nj@z @r3 k001 l01z.