There's a chance they might do something different this year due to Dreams.
Will they have Dreams and bonfire fireworks?
Bastille day is coming up soon and they normally have special fireworks for that, perhaps that will give us a clue.
I went last year and the fireworks were on the lake and were set off at 8:30 as Elaine said. To watch them you stood infront of SL or HNY. You'd need to get there about half an hour early to get a good spot.