Here's my thing. I'm speculating that this will open in 2024. Why would a basic retheme take over a year to build? Universal builds pretty fast. Why close it this January? That says to me that there will be at least one brand new attraction. Could be a couple of flats, could be DreamWorks Theatre, could be the Kung Fu Panda boat ride. There will be something.
Also, why announce the closure three months ahead of time? These aren't exactly fan favorite attractions.