That screen has been proven to be a fake, but here are a couple of videos where you can see that she is on the select screen. Too bad no one actually played as her so far.
http://www.youtube.com/watch?v=q6xOrw6rBVs
http://www.youtube.com/watch?v=bF3abjzihyY <-also shows 18 stages to select from.
Now this adds my favorite Alpha character to the roster. I guess I'll be using her along with Viper, 'Gief, Dhalsim, and Cammy. I hope she isn't able to do some of the dumb stuff from Alpha 2 with Soul Illusion.