Does anyone know any details concerning why you can't book fast passes for Toy Story Mania after the 15th of October?

I know I read they are adding another track at some point.

My guesses are:

1. It's going down for maintenance and it isn't announced yet.
2. They are suspending fast passes for the ride for some reason (maybe needing to rework the line locations, etc.) and the ride will actually still be open.

I'm trying to determine if I need to rework my plan, or just roll with it. Any info is appreciated, thanks.