They just announced their dates via a live stream for September 23-25. Bummed they didn't decide to go back to October like the first two years, September it's pretty damn hot.
I was worried the fest wasn't returning when there was no update on this year's festival. Over its first three years it has become one of my favorites. Awesome laid-back vibe to it, the added awesomeness of experiencing Vegas after the fest closes down each night. It's really unique. I thought booking Stevie Wonder and Duran Duran was a huge win for the festival last year (though the Imagine Dragons booking left something to be desired, but made sense given its their hometown).
Hoping this year the lineup improves from last. 2014 was the best. I plan on going as long as the lineup isn't a total stinker after having attended each of the first three years.