In this specific case, I think AK had AM EMH. They did for all of June and I heard they were doing all of July too. Plus, they're letting guests into AK early and essentially walking them back to Pandora so they're pretty much getting on the ride at open instead of walking through the gate then.
If you're not familiar with this, it's called Extra Magic Hours. For guests staying onsite, the parks either open an hour early or stay a couple hours after closing. Certain parks do this on certain days; the schedule is on the Disney website.