A new mystery capcom website emerged with a teaser trailer that shows what might be Ryu and Ken (maybe?) shadows fighting each other:
While the teaser trailer is only seconds long, we learn 2 things:
1- An announcement date which is tomorrow at 5pm Japan time (8am GMT)
2- The game subtitle might be the "new warrior" as that is what the teaser website's name.
looks like we will finally get to see Super Street Fighter IV tomorrow morning!
Check out the mystery website here