"Forenote: Additional art I may have not posted here is on my DeviantArt.
Assets depicted are all ported by Polingo, who should (last I checked Discord this evening 1/2/18 23:50ish where I'm at) have the two humanoids in this depiction on the workshop very so0ON.

Assets: Citadel (Halo 3, incomplete, so big it clips out of the map), Phaeton (Halo 5), Sentinel (Halo 4 and onward), Shadow-of-Sundered-Star/Ur-Didact, First-Light-Weaves-Living-Song/Librarian, and the Mantle disc thing.

They are arguing about where to go and who'd listen to their wisdom."