I am not a fan of blind packed items, especially when they don't have some sort of identifying codes, so I personally would not be in favor of concept for figures. I have had a hard enough time finding decent paint apps on most of the Legends and Mission Series figures. Blind packs probably would have kept me from collecting the figures altogether.
That being said... I bet an OT-themed series would do well here in the States. Stormie, Luke, Vader, 3PO, Fett, etc. If Hasbro got them out for $4 or $5, either in boxes like the Japanese figures or bagged, they could be a lot of fun.
Expanding upon Jesse's droid idea, what would you guys think about blind packed Build-A-Droid parts? Imagine the parts for an astro split across four separate bags, at maybe $2-$3 per bag. That could be a solid way to expand the Disney concept to everyone.