New Super Street Fighter IV Characters On The Way?

Capcom is testing Super Street Fighter IV in arcades in Japan (console version shown), and it looks like it introduces some new characters above and beyond the ones in the console version of the game. Could we see these released for the console as DLC?

The cabinet contains two extra player slots that are currently blacked out, and ads for the Japanese arcade game tease new characters as well. If there are new fighters, hopefully we see them via DLC for the console version.

If there are new characters, who would you like to see?

via Kotaku