You didn't say how you will be getting to the resort, either (but, own car, etc.) This will make a big difference.
It's a half hour show, and it'll take about 15 min to get out of the stadium, so you won't get out of the park until close to 7:30.
They will always hold your ADR for at least 15 min, so you will have about a half hour. If you have your own car, you'll definitely be fine.
If you have to wait for a bus, it'll be close.