You probably have a good idea of what you want to place, but if you are still fishing for suggestions, I have a few. Some of those special districts that were mentioned on the first or second page (scholar's, temple, warehouse, etc.) should nicely fill up a bit of the space. Also you might want to put in gardens, plazas with monuments, and parade or tournament grounds. Given that Ankh-Bathor is likely the capitol of the nation/empire/kingdom that it is in, I'm surprised that the previews have not shown more extensive palace/military/government and bureaucratic complexes of buildings and structures such as the national theater, cathedral, or museum.