Capcom have done us all a little favor and narrowed down the release windows for both Street Fighter IV and Super Street Fighter 2 Turbo: HD Remix.
According to a Capcom-Unity forum post by Christian Svensson, SSF2T:HDR is done and submitted for certification. The game is scheduled for an assumed late-November release, however it may not be a simulatenous PSN/XBLA release if either of them encounter snags during the process. None of this is 100% official yet, so keep your eyes out for updates.
As for Street Fighter IV, it looks like Japan will be getting the much anticipated sequel in February 2009. Early adopters will also receive the animated movie which fills in the gap between Street Fighter II and Street Fighter IV.