Looks like Capcom isn’t done with Street Fighter IV. A teaser site opened with "new warrior" in the URL and pencil sketches of two characters fighting.
Street Fighter IV just came out in February. Wouldn’t it be a bit early for Street Fighter IV: Hyper HD Edition? Maybe this is some kind of DLC.
The project, whatever it is, will be revealed on September 29, 5:00PM Japan time. Set an alarm or prepare to stay up late for the announcement if you’re in North America.