Street Fighter X Tekken has already been released on the PS3 and Xbox 360 so now it will be released on the iOS this summer Capcom has announced.
Capcom says:
"brand new modes and a brand new take on the tag team mechanic."Nina, Ryu, Chun-Li and Kazuya are the only confirmed characters so there are far less characters so far in this version than the console versions.
We will see if more characters will be announced either on the game or via download.
Source: Joystiq