Street Fighter IV producer, Yoshinori Ono has said he’s not currently working on a new Street Fighter game for Xbox One and PS4.
Ono posted a message on Twitter saying he doesn’t have the R&D budget and staff to work on a new Street Fighter game.

Rey Jimenez (Producer) says that Capcom is “still very early in development of the initial [Ultra] content” for the update. Ultra Street Fighter IV is scheduled to be released sometime near the first quarter of 2014

source