Hey long time lurker, first time poster (usually stick to HNN).
From my very quick search permits have been filed for 5 houses. Ignoring tents the only “usual” locations without a permit are SS19 (the Shining maze last year), Shrek, and Parade building.
There was a really odd tweet posted by the official universal Orlando account a while ago involving Shrek, which no one could work out. Seemed to be hinting Shrek may close, but return in another form. Can’t find it but do remember it being really random and very odd.
Having said that, it wouldn’t be that surprising if Shrek is not being used given the rumours it may be going soon anyway. Also, given Nintendo land was supposed to annex pretty much the area around the parade building it would make it even more difficult to get to (remember the trek to AvED last year?). So again, wouldn’t be too controversial.
What would raise eyebrows is if SS19 isn’t being used (so far). So that’s my guess. Probably wrong on the speculation here, but that’s half the fun right? Haha