Online multiplayer will indeed be a feature in Super Street Fighter IV 3D Edition for the Nintendo 3DS.
At its recent presentation given at Nintendo World attended by G4, Capcom’s Yoshinori Ono confirmed that the forthcoming mobile edition of SSF4 would support at least two online modes: worldwide online play and channel live.
G4 explains that worldwide will be your standard versus offering, allowing you and at least one other player to hook up via the Internet and get your brawl on. Channel live, on the other hand, is simply a match viewer, presumably allowing you to watch recorded matches from around the world.
These modes will bolster the previously announced on-the-street features of the game that’ll take advantage of the 3DS’ ability to detect other 3DSes. The first of these modes is figure collection, which is an automatic mode where the game simulates a fight in which the victor takes his opponent’s figure. The other mode is a simple versus match option that lets you fight that dude with SF4 data.