Hey, 31 spaces! Right on.
Going left to right, it looks like we have Parka, Elegido, Gronda, maybe Mesias, Charly Manson, Octagon, Electroshock, Zorro, Chessman, and Cuervo on the top row, and Doc Wagner, an unflattering photo of Konnan, and Psicosis on the bottom row. The red highlighted guys are rudos, the blue are tecnicos. Obviously, you’ll have to unlock a lot of guys as you go on.
No hint on the last two, so far.
If anyone else sees E3 previews of this game, feel free to link to them in the comments.