That is sounding great Duck. I think you have taken a great direction and there are plenty of opportunities for pictures - some machinary, one of the city from the sky (or the map image), some machinary, the zoo (or we cheat and use a pic of Tourok's private zoo), something magical (maybe wisp and golem and cauldron if possible).
The only thing that was left out was Twilight and the Myst worlds. Perhaps a three way split picture of the Myst worlds would be suitable (ala
http://en.wikipedia.org/wiki/The_pioneer_%28painting%29).
Sorontar