Source
From the release:
I have just added four more of the Sedition Wars preview resin miniatures to the Studio Store. I'm staggering the release of the ones we showed at Salute. This time it's four new Strain exo-forms and they have now been added to the Studio Store.
Retiarus and Thraex are the phase 2, and 3 forms of the Brute brood-line, while Naga and Medusa are spawned from the Siren brood-line. More information and larger images can be found on there Studio McVey website.
We'll be adding more of the previews to the store over the next month or so, and each time I'll send out a newsletter to let you know they're on sale.