The only one I can see them using, if my memory serves me well, is the one directly to the left of Transformers. The tram drives by it, not behind it or anything. Ill post a pic of the one I'm talking about. I'd only see this happening if they rearranged the walkway to this hypothetical ride and if they moved Universal Experience elsewhere and if they built a new soundstage to make up for it elsewhere. it wouldn't be easy but I feel like it'd be doable in many many years if need be.
Again, just going off of my memory, ill post which one I'm talking about. If I'm wrong, my bad lol
EDIT: yeah, looking at a map, its the soundstage directly in front of the Transformers extended queue. The tram drives along it's side/by it. If they reorganized/split the flow of traffic between this "future" ride and slightly reorganized the transformers entrance, I think it would be doable.
Again, all hypothetical though
haha