I posted this in the RoL thread but it's pretty relevant here too with the night conversation:
Another thought on all this is Avatarland and what that area could be like at night. Given the bioluminescence and how that is being incorporated around the entire land, perhaps there could be "light" shows that take place across the land a few times each night? I'm thinking something similar to Pixie Hollow at Disneyland (but on a scale of the entire land):
If something like that happens, all of a sudden you have 5(!) distinct nighttime entertainment options: 2 dance/music areas, ToL Awakenings, and the Avatarland bioluminescence show(s), with Rivers of Light being the headliner.
With that much going on, that can reduce pressure on RoL because it's not the "only" nighttime show.