Amazing
Awesome fight choreographic, i LOVE the way u upgraded the chars. You could use a bit better graphics, but since these are the sprite versions from old games, I'll give this a pass.
You have 3 problems.
1. Audio sucks, If i were you, I would work on a better audio quality. At times it pierced my ears, and overall the sounds were really bad. I realize that these are the ones from the original games, but there are way better sound packs out there that could fit scorpion and the other guy ( don't really know him).
2. Not the best camera, no smooth outs as well. The problem is that when they start teleporting/flashing, throwing stuff, etc. The camera is following them. But since the movements are too fast or there are too many things to follow, the camera starts to jump around like crazy, giving me a headache and making it hard to the viewer to understand what the hell is going on.
3. Fluidity is really bad. Again, I know you used animations from the games, and at places it's really nice, especially from 2 min+, but at times the moves seem so unnatural and i noticed a 1 second pause (between the hit and the reaction from it) on a few occasions. All in all, a good flash.