Updated: Capcom announces new update to Street Fighter 4 series - asks community for feedback
I don't think many people mentioned this, but Capcom can easily add in extra costumes for all of the characters. Would be nice to change up the scenery a little bit. It would be nice to see new characters, but I am not too sure if that'll happen since they will have to create the character, and then balance that character(s) against the whole roster. Don't think they did such a good job with this ...

Capcom intentionally being vague if Street Fighter 4 series update will contain new content or just balance changes
Looks like Capcom is testing the waters and looking to see if the community wants just a balance update or a full new content release. I don't mind either way - updating the game one way or another will breathe more life into the game. I would love to see new stages and character-specific stages would be awesome. Karin and Urien for new characters would be nice as well.

Interview from EVO Champion BAS - has been preparing for EVO, problems with AE v2012
Why is there so much arguing back and forth about SF4? Saying your comments here don't matter much, go to Capcom-Unity and write down on the forums like Combofiend said, what changes should be implemented.