I have no idea how likely this is to ever happen, but I would absolutely love to see a line of minis based on the artwork of Darrel K Sweet. It seems like if this was possible Darksword would be the perfect company to do this.
With Larry Elmore, Keith Parkinson, Jeff Easley and Clyde Caldwell with full catalogs of art to choose from, along with an entire VIF line, Des artwork on the critters and the GRRM Masterworks line, we have enough source material to go for 20 more years.