I mean trackwork was finished back in April and if Zadra proved anything they can get these things up extremely quick under normal circumstances. Plus, it wouldn't have been the first Energylandia coaster to open with incomplete theming even if it did.
I‘m not sure, but I do think that they want to open it with all the theming , or atleast the water filled in. Here the theming really makes a difference. Also this is the First coaster of Energylandia that really has theming during the ride.