Yes, Of Course There Could Be Super Street Fighter IV DLC

The arcade version of Super Street Fighter IV features characters that are not in the console version. That might change.

Producer Yoshinori Ono tweets that he has written a proposal about downloadable content for Super Street Fighter IV. He adds that he is heading to Capcom USA's San Francisco office, presumably to pitch the idea.

Here's his original tweet: "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"

Why wouldn't Capcom release the Super Street Fighter IV arcade extras as DLC?

@Yoshi_OnoChin [Twitter]