These characters were in specific character movies
Adon = The current champion of Muay Thai Kickboxing. Get raped by Sagat in less then 2 seconds.
Yang and Yun = Looking for Fei Long, but seen what Chun Li can do.
These characters will should be in the game:
Sean = Trained by Ken, but was weak in Final Strike.
Shin Akuma = The final and most deadliest form of the Shin power.
Alex = Winner of the Street Fighter III tournament. He also defeat Ryu in a one on one encounter.
Dudley= A boxer from Great Britain. He has a huge online cult following. People believe this is what Balrog (Boxer) should of been.
Karin= Sakura rival from Alpha series.
Ibuki = I would link her to GEN. She learn his style but it really broken. She attends to a SCHOOL that RIVALS, Sakura. (I know you guys that play Capcom games will get it.) She had fought Sakura in a hard fought battle and lost. Now she is out for Revenge. Also, Chun Li is after her because of a recent break in by a Ninja in Hong Kong, but it was not Ibuki.