The likelihood that SF4 will be Wii Exclusive is ZERO.
In fact the likelihood that SF4 will show up on the Wii is like 40% which makes me quite sad.
But to tell you the truth if they don't keep it 2D then I am not interested in the game.
Also, I hope they bring back the characters from their Alpha series, because I want to know what has happened with them.
Truthfully, I would have loved to see a game where Ryu, Ken are much older and are like the bosses of the game.
Then you have Sakuri as a young woman with her own destiny and you kinda see a story about what happened to the characters after M. Bison was defeated.
Create a new villian and keep it shrowded in Mystery and create a new anime/manga series that tells the story of this new evil coming to being and what it means the SF characters.