More info coming from Comic con 2011. Capcom not only revealed new characters such as Dhalsim and Poison for Capcom side, Steve Fox and Yoshimitsu for Tekken, but they also released this new cinematic trailer of other characters to join Street Fighter X Tekken.
It's an awesome trailer. They reveal Hugo with Poison, gets their asses kicked, and in the end, Guy and Cody shows up. It's pretty awesome that their adding more Final Fight characters, I bet their going to officially show gameplay when they reveal their Tekken pairs. Poor Haggar though, if he had his pipe it would have been a different story. Respect the pipe!