Most people are fairly certain that they are just retheming it again and turning the trains around to their original direction. It'll probably re-open next year with a new marketing angle.
They may be taking the opportunity to switch out the launch system with something a little more economical. The big problem with this ride is that it takes an enormous amount of power to launch a train from zero to 70 or whatever. That's why so many rides these days use "swing launches" that involve getting the train to a rolling start before the main launch. It takes like half as much power to launch a train that already has some momentum vs. starting from a dead start.
I don't think it's possible to change Mr. Freeze into a swing launch, but perhaps they can update the motors to the latest model or something and get an efficiency boost.