Wow. I love it!
Guess I should review this, since I've watched it four or five times now. The action is very smoothly assembled and the characters look great together. The fight had depth and was very interesting, although Scorpion gets a little repetitive (people don't seem to realize, it's not really your fault here - old MK characters only have three or four moves max and Scorpion's hook was always his best weapon.)
I gotta say, it seems weird that Ryu wouldn't win, since story-wise he's gotta be one of the strongest SF characters, but then again Scorpion's a super ninja from hell. Evil Ryu, though... that'd be sweet if he flipped out and went Evil mode on an MK character. ^^
The music went really well with things, the sound effects were great. The story was good, lately I skip the beginning most of the time when I watch this, but it's pretty good as far as these things go. A couple funny parts like Liu Kang getting nailed by the Hadouken give it bonus points.
All in all one of the best Flashes I've seen on here. Nice work!