While looking through my collection of Myth III prelease images I found a few little bits of info.
Just a note for the Interseting Notes section for the Level Spider God.
In a MacSoft ad for Myth III one of the ingame shots show your dwarves battling Skyrosh on level ground and in a brick room, also the spiders themselves have red, um, rear-ends and look more like Myth II spiders. It appears that originally you had to take on Skyrosh one on one rather than doing it slowly and tactically from that ledge.
Also for the Level, Flight from the dark:
It appears from prerelease pics that we were intended to fight the Battle. I have found pics showing a load of Archers on high ledge and warriors facing armies of Thrall below, the terrain is very similar to that of Flight from the Dark.
Warlocks at some point during the developement were green clothed!
It appears that we were intended to see no Iron Clad Trow earlier in the game, as shown by a green fielded image, with a Trow surrounded by (apparently friendly) Oghres.
-zeph