That wreckage must have been there for quite a while, yet it still has functioning droids and Wren units. Its amazing that scavengers haven't picked it clean and even the scientists haven't look at it. Functioning Wren units would be beyond useful on Motavia.
I always felt ripped off when upon entering the wreckage, all I got was a control computer and not a full fledged set of ice, sand, water and mountain worlds... Never mind moons!
This must have been the wreckage of their Alisa II ant colony.
The other side of what? I don't really follow you. There aren't extra doors or anything, just broken floor tiles blocking off many potential paths, like in Dahlia/Azura/Skyhaven/LaShute Dungeon.