We walked back there today. There really is not much to see but a painted wood wall. I could see what appears to be large lights inside. That could be part of a stage, or just for workers who are there after daylight hours.
No crane. Can't tell much of anything.
Now we did notice some things direct across the walkway that we have not noticed (or at least recalled) before.
One was a door that may have been painted as such already. But it was so cute I snapped a photo of it.
It's just a standard do not enter door for CMs. The door would lead into the Muppets theatre building.
The sign reads, "This Door Is Alarmed" and Overly Concerned. (Something to that effect.)
And opposite of that was like a character water tower.
If anyone wishes to see photos of both, I can post them.