You know you can always mess with upgrades and explore around there. That's how I got my map 255 upgrades to work. There is plunty of stuff to document for that area. You can make a catapult upgrade blizzard, switch upgrades to shield to sword vise versa for unlimited upgrades.
With that being said I think we can make farms train grunts, dark portal create demons, etc. Need to find that area....