I'm guessing ours will take longer to complete the interior given how distinct each set piece was to what was happening in Splash, where as Disneyland’s was much more of rocky crevaces/marshland. If I had to guess ours got more substantial interior demolition/reconstructionThat would be a lovely surprise. I struggle to believe it will be ready much before Christmas but that’s just a guess. I don’t know the current state of the project (in particular, the inside. They could easily finish the outside by next summer).
I do know they legitimately want this done ASAP.
That being said, DL’s closed 4 months after ours and they are doing the same amount of work (right?). If DL’s can open in 2024, perhaps summer is possible in MK.