Well someone just posted pics of Sakura on the official Capcom Community forum. Sakura is not a confirmed character so its very suspect with it being posted today (April 1st).

Also the official Japanese Street Fighter IV blog, and U.S. Capcom blog have both posted images alluding to the inclusion of Sheng Long in Street Fighter IV. Sheng Long as a playable secret character was mentioned as a april fools joke in an old EGM magazine back in the days so this is also suspect.

Which of these could be real if any?

Related posts:

1. Sheng Long aka Gouken Unlocklable in Street Fighter IV
2. Street Fighter IV: Sakura Videos
3. Street Fighter 4: Sakura Gameplay Video
4. Xbox 360 April Fools: Wireless Helmet, Vintage Edition
5. Sakura Confirmed in Street Fighter IV Console Versions