I don't buy that it's only going to be one show per night. I have to think they will update the schedule over time and do AT LEAST two (three in busy seasons).It's showing up in the FP list but no availability.
Pricey Dining package might be the way to go these first few days if you're dying to see it and won't be back for a while.
Also- it's only going to be ONE show per night. Even at just 15 mins :/