Closest representation of Avatar would probably be Vanguard for the Marines and Amazons for the natives.Th map generation tools look very interesting and powerful. Thank you for the in-depth look!
I can't wait to try community versions of various famous Sci-Fi planets: Arrakis, Trantor, The one with the Unobtanium and the blue cat people...
Ludomancer
Trantor... I don't think Asimov really pinned down the nature of the military forces of the Foundation and Empire. Vanguard is possibly the safest assumption.
For Arrakis... I don't think the canonical structure of armies in Dune can really be represented (the slow knife penetrates the shield and all). If using Dune 2 and its descendents, Vanguard, Dvar, and Syndicate probably roughly map to Atreides, Harkonnen, and Ordos respectively, while secret techs can probably serve to refine this.