Marvel vs. Capcom 3 than just "hey, this outfit would probably look cool in red and black." IGN recently explored the canonical comic book origins of a handful of Marvel fighters' extra duds, including Storm's crimson X-Treme X-Men get-up, Dormammu's Strange Tales green-and-yellow armor, and Captain America's Red Guardian costume, which, as you probably sussed out, is pretty red.
It looks like Capcom (with a lot of help from Marvel, of course) is taking these character skins pretty seriously. We're happy to see that so much consideration went into these outfits -- but we can't wait to see how they explain all the different additional costumes for Capcom's fighters. "Oh, you don't remember that time that Haggar wore a bright purple chest-belt? That was a real thing that happened, we promise."