OXM: "Street Fighter isn't about plot. It isn't about stealth sections, sniper rifles, five-hour cutscenes or any of that nonsense. You know this. We know this. Everyone who has ever played a game in their life and knows you're supposed to press Start at the title screen knows this.
So rather than go through the polite technicalities of a Street Fighter IV preview - hey, it's still two people hitting each other! - it made more sense to just play it in two-player all day and observe the results."