im not sure if thats entirely accurate...i think the phases may be Nighttime show, then Nighttime safari, then avatar
and yes i read Robert Niles article...but jason garcia mentioned the phases differently in his piece this week
"Disney has so far disclosed only a few details about its Animal Kingdom work. Additions will include an evening show combining live music, floating lanterns, water screens and swirling animal imagery, along with a revamped, nighttime version of its Kilimanjaro Safaris ride. The "Avatar" land, which will be the final phase and will open sometime in 2017, will feature floating mountains, lush jungle scenery and a ride meant to evoke riding a "banshee," a birdlike predator featured in the film."
i could be wrong