As you may know, Hasbro has partnered with Gentle Giant in producing the Star Wars Black 6″ (confirmation of this can be found in this interview with Gentle Giant).
In an encouraging sign, it appears that Funko may be working with Gentle Giant as well for their 6″ line, which is scheduled to include figures from Game of Thrones and Firefly. In reply to a post on the Funko Fanatic forums (a post started by yours truly, actually, speculating as to who would sculpt the line), Brian Mariotti of Funko writes, “I think Gentle Giant is incredible….hmmmmmmmm.”
So I think it’s safe to say Gentle Giant will be helping to produce Funko Legacy. That doesn’t automatically mean Mal Reynolds will have the same quality of sculpting or articulation as SWB6″ Han Solo, of course; different decisions could be made regarding articulation and how much to spend on paint applications, quality of plastic, and so forth. But Gentle Giant’s involvement is a positive development – at least for those of us who are hoping for something close to SWB6″.
UPDATE: On a related topic, Brian is also promising SWB6″-like articulation on Legacy.
Perhaps this will be a situation similar to Legendary Comic Book Heroes, where two lines were worked on by the same people (ToyBiz making Marvel Legends, and later Marvel Toys making LCBH), which ensured the lines were completely compatible.