The night of a 8:00 close, they will have Mystify. It is too light outside at 7:00 to have fireworks.
Some people really love Mystify. I have to admit, I'm not in a hurry to see it again. I have heard that sometimes they shoot pyro from the top of the skytower as part of the show (they didn't when I saw it), and I would go back to see that. Otherwise, it's a very crowded situation to see a less-than-spectacular show.