I remember this topic back on MKO, I hated it then, I still hate it now. Why is it the Terminator that people think would be great to see concepts of it in this game?
Anyways, Li Mei doesn't need to be anyone from another series other than Li Mei herself. What they did with her in X was fine enough. In fact, a lot of people happen to like this cameo. Does she still have a future with Mortal Kombat? Maybe, depends on if the developers have any intentions to keep her as a fighter. But for the love of god, they don't need to take a character from a popular sci-fi action series and turn it into an existing character now that they're adding personalities to them for once.
I can see her as MK's Sarah Connor. Not with muscle, more like a strong determined fighting woman.
Not to mention, this makes no sense. If you're referring to Sarah Connor from the Sarah Connor Chronicles, I can't really say anything because I've never seen it. But if you're referring to Sarah Connor from the original series, Sarah doesn't really become a "strong determined fighting woman," until like the middle half of the second movie, and I wouldn't really describe her as that. In the first, all she does is run and rely on Kyle Reese to get rid of the terminator. And even when he fails at that, she kills it by crushing it in a machine, she really didn't do anything except press a button/pull a leaver. And in the second, she's in a mental institution/psychiatric ward or whatever... This doesn't sound like a personality I would want to see Li Mei. If you want to describe a character for Li Mei, I would have chosen anyone else but Sarah Connor. And it's mainly because, as Xenon said, neither has anything in common. Li Mei doesn't really do anything except help her people to enter Earthrealm for asylum after Mileena started rampaging through her village. She doesn't even really fight.
Surely, she can become a fighter in the next game by maybe having to become a fighter with help from the Special Forces. But that's not being a Sarah Connor. Neither are alike, sorry.