Street Fighter has more of an identity than Marvel vs. Capcom.
They ought to be grateful that people remember the sequel to it since it was so long ago I own a copy of it for my Dreamcast.
There's no sense in ever having DLC come out after a game.
Where I do love the fact that games like Fallout add entire levels to games, sometimes expanding on a world twice as big as the one that was shipped, DLC also falters IMO when you have game developers that take advantage of it by including DLC later on in the games life just to try and keep it relevant or to price gauge their consumers.
With a game that is fairly one dimensional like SF or MvC3, where you go to a character menu, pick somebody, then fight for a minute and a half, I see no reason for them to not package the product as a one shot effort into consumers homes.
If this game had 50 characters to choose from out the gate, I'd have borrowed money from somebody to get this at launch, but there's that notion in my head saying "Dude, don't buy this because you know as soon as you do, there's going to be a collector edition that will include every item that goes up as DLC".