And another new SF4 character is named Abel. He seems to be a faster Zangief.
Watch as someone chooses to be play as C.Viper vs Abel at the AOU Arcade Show in Tokyo. You can also see the characters available in SF4. The only thing we don't see are the bosses that you have to fight at the end.
C.Viper vs Abel
Street Fighter 4 Character
Abel in SF4
[Source: Sony PS3 Modding - Homebrew, Upgrades, Mods, and Hacks]