Yoshinori Ono has just announced that Ultimate Marvel vs. Capcom 3 will be a launch title for the PS Vita. The game will run at 60 frames per second and will feature an online mode, just like the console versions.
There doesn’t seem to be a console exclusive character for this game, unlike Street Fighter x Tekken. Speaking of which, Ono-san just announced that SFxT will feature Toro and Kuro the cat as playable characters in addition to Cole from Infamous.
Source: Sony Press Conference