Those pics are from an early build of the arcade version. I'm sure the home console versions will have more characters and possibly some unlockable ones. I wouldnt be too worried about only having ten characters at this moment. I mean some of the cards were blank too.
As long as we are on that topic here's some characters that aren't in that pic i'd want.
Adachi Naoto, Margaret, Elizabeth, P3 Female MC, Minato,
Shinjiro (though i doubt that's even possible)