I've heard here and there that compared to the Goti, the GB has quite a few less poses, and the butterfly theme certainly hasn't been overutilized so that there are no more potential designs.
I do not know if this is possible at this point, but I would love to see:
1) Skirts (long and short) made from the wings, perhaps overlapping wings?
2) A lacy fan, something along the lines of the mask.
3) butterfly bowtie, or perhaps corsage
4) butterfly lace kite?
5) face paint (you know, like at halloween, where you get your whole face done up as a butterfly?)
These are just my suggestions. I love the GB anyway, so I'll buy it no matter what other people think.