Just putting this out for people to see: I've spent the past couple of weeks working on a mod that adds every culture from Age of Mythology into Civ 5 (Greeks, Egyptians, Norse, Atlanteans, Chinese, plus Gargarensis' bandits as an added bonus). I'm a little over halfway done with it as I've finished up the three vanilla cultures, so hopefully I can ride the coattails of this map pack's success on the front page, lol.

The civs are more or less based on the bonuses of a specific major god rather than some overarching concept, except for the bandits who are basically a hodgepodge of the regular Mediterranean cultures. I should also say that the gods they're based on don't really fit with the storyline (the Greeks are led by Arkantos but are based on Hades instead of Zeus).

This does require both G&K and BNW, as well as Denmark (for now).
Here's a sneak peek.[i.imgur.com]