The armor in the photo reflects and builds upon the basic explanation in the LotF novels. He was essentially descibed as wearing red armor with family sigils/markings on it. That was the end of it.
Karen Traviss has stated in interviews that in her mind, her characters were all wearing basic Jango armor coverage, medium Modern Era armor.
There have been a couple of other members over the years discuss this armor but, Ive never seen anything beyond the discussion an planning phase come to fruition.
What we would be looking for from an APP Team perspective is, adherance to the known artwork. The area's not shown will have some room for interpretation but, should meet medium armor coverage... ie, backplate should be Modern Era backplate, not a cape. Modern Era Fett knee's. Shins as well. If you wanted to adapt the shape of the shins to match the custom aspects of the thigh plates, that would be acceptable as well.
From what's seen in the photo, we will be looking for...
1. Helmet: Jango style Modern era helmet with RF
2. Custom chestplate design
3. the ab canisters and shoulder canisters and pouches.
4. Custom belt and pouches
5. The custom shaped thigh plates.
6. brown leather holster ont he left leg.
7. the weapon in the holster is open to interpretation but, the exposed portions should match the artwork as much as possible.
8. The gaunts are pretty well blocked out, you could attempt the design based upon the limited view of them or, standard Fett gaunts as well.
9. matching paint apps to the artwork not the figure
10. No jetpack
Here are some images of the Dred Priest figure produced by Hasbro. Has some more views of some of the custom leather and accessories that are essentially the same as the image.




Hope that helps!