It's outside the original building, but will still have its own building. I don't think the trains will actually leave the buildings, they will probably just go through a tunnel to get to the other building.
I hope just parts of the ride are well lit, otherwise the ride would be completely ruined (I just want to mention that I already consider it ruined, but that would ruin it even harder).
Update: I just read that this track will be placed where the light tunnel used to be. Perhaps it will be replaced with a similar effect.