Phase 3 died. The Mickey ride and anything else being done is just ad hoc for now. Big plans, like for a 'land', are in blue sky world right now.
I've got to think that there are some sort of plans -- or at least active development -- for replacing Launch Bay with something. Once SW:GE opens, it won't really fit at all and that's prime real estate. I mean, maybe they just bring back the Art of Animation stuff, but I'm hoping they tear down the whole lot and get something new there for 2022 or so.