i have a few things i want to see (some of this may have been mentioned before, i only skimmed through about 15 pages)
real world
The spaceport vehicle redone to look like the US space shuttle.
A larger military base/airstrip.
a docked landmark or plopable ship of the USS Iowa
Nuclear missile silo. Like the missile test range but with a bigger lot, more income, less duds, rare duds cause small nuclear explosions.
star wars
AT-AT construction yard (with the AT-ATs in gantries or in parts)
(if possible to animate the AT-ATs) AT-AT proving grounds
(if possible) drivable AT-AT
For scale I think each AT-AT should be 1 square wide and 2-3 long. Should move really slow, but be unhindered by terrain (can climb fairly steep hills, ford shallow water. Etc.) it should also be insanely durable.
pm or email me if you think it's possible