A video demonstrating Scorpion's combos:
MK2 didn't have her and she was instead shown being chained/captured along with Kano in the stage with Kintaro & Shao Khan, and seeing as how MK2-based this game is, it's questionable as to whether or not she'll be in it. Though the future may prove me wrong, I'm thinking for now that she might just be a DLC character.
This is a Mk3 not Mk 2 based game, though.
the game spans Mortal Kombat 1, 2 and 3
More screenshots of Sonya: