Yeah, the title (Grand Ages: City) implies they'd like to do a whole series, which I would be a fan of. The same was true for Children of the Nile; the full title is Immortal Cities: Children of the Nile. If only Tilted Mill survived to do a full Immortal Cities series!
And speaking of Tilted Mill, in an alternate dimension Hinterland is the seed of what grows into a brilliant new genre that crosses action rpg with city builder. In this dimension, it's merely a wonderful crumb from an unseen banquet.