I think RRR will be removed if by some chance they decide to take out the soundstages for park expansion. Or it will get replaced by another coaster of some sort.Re-paint RRR yellow so they can expand the Minions Land/Illumination Land . Blue sky, but they could try to turn the Music Plaza and RRR into Super Silly Fun Land.
I don't think the Soundstages are going anywhere. They get used quite often for filming still and of course, for HHN houses.