It's almost confirmed the last three chars are Dudley Makoto and Ibuki.
Ibuki is for sure, we've seen her kunai in a screenshot.

The other two aren't sure but expected. Other possibilities are Alex or Elena. But the person who leaked some info earlier, everything has come true except Dudley Makoto and Ibuki, and the only 3 spots are where SF3 chars would be going.

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