I love collection Mortal Kombat movies. The fact that so much has been coming out on bluray makes it even better. Here is what I think of so far:

Five Deadly Venoms: Scorpion and Snake and of course all the ninjas have a very similar design.

Big Trouble in Little China: Raiden

Enter the Dragon: The whole tournament aspect, Bolo for Goro, Bruce Lee for Liu Kang. While there is no "old man" you can pretty much assign that to his teacher. I think Han captures the Shang aspect nicely though even though he doesn't exactly fit the scenario.

Blood Sport: Man is there any better example of Johnny Cage....nut punch to boot??

I have never found a solution for Kano. I don't even know if it exists.

As for Cynthia, I know there has got to be some prototype. While No Retreat No Surrender 2 has the hand band thing, I just can't see this as being a collection piece. There has got to be something that directly inspired the team. Who knows.