I suppose the concept art in question here is of interest, but it's definately FS2-era/Reconstruction. What I wonder the most about it though is exactly what the artist was going for. The forward section irrefutably is that which ended up on the Artemis, the aft engine design is akin to what we see on the Myrmidon, and it also has this interesting bridge between the Herc I and the Herc II. The thing is, it's all of those and none of those at the same time.
If I saw that design made, I'd want to see it come out as a pirate kitbash sort of fighter, but one which was made properly - not like the Star Wars-esque uglies as seen in Blue Planet.