User blog comment:LoveWaffle/Quicksilver, Scarlet Witch, and Hulkbuster Concept Art for Avengers 2!/@comment-24751588-20140320001324/@comment-4651179-20140320194720

Maybe more than Scarlet Witch concept art this is Wanda Maximoff (or whatever name she gets / can get) concept art, like, before becoming an Avenger, or even before becoming a hero.