Oh darn, really? That's too bad- well maybe she'll be more prolific after the SDCC. It's not like she'll be a limited edition, so I'm sure she'll turn up (and not sell out) at SOME point! Wish she were available on their online shop...
Actually, I bet that's the issue. I bet the stores were supposed to wait until after the SDCC to put her on the shelves, and many (but not all) don't pay close attention to those sorts of things and put them out anyway.