Super Street Fighter IV Arcade Edition could see a new DLC coming out in near future, as its producer Yoshinori Ono has tweeted just a while ago about the same.
Here is what Yoshinori Ono Tweeted:
"Just now, I had written proposal about DLC for SSFIV ae's PSN,XLB at last. I'll go to Sanfrancisco on tomorrow !! CAPCOM USA exist in SF. ;D"
It has been said that the new DLC will feature new characters Yung and Yang along with some of the balance changes to the game. The DLC will be coming out in Japan-Only Arcade Edition of Super Street Fighter IV for PS3 and Xbox 360.