What an amazing looking little bust, it's a shame Sideshow never went to these lengths with their Legendary scale line. Hopefully Prime 1 will pick up where they left off and keep these going in 1/2.
Regarding the heads on this, I'm thinking that they are just showing off how it will look with the heads included with the statue. This should just have the closed mouth head with an optional damaged mask, but then this is Prime 1 and they love options so who knows....