maybe we will get to ride more than once?
It's possible. Just depends on how they want to handle access. (If any of the previews get re-rides, I think the
D23 event is the most likely, given the limited scope and that the rides are happening after-hours.)
On one hand, they could let people in with their event lanyards, noting that they have to be in line before 10pm to ride. With 500 people, the first riders might then get to ride twice.
But they could also choose to load everyone up with a one-use LL.
My uninformed guess, based on prior events: they'll let people in the entrance, then hand them their event commemorative item at the exit, and that'll be it. (If it's a poster, it'd be easy for them to know that someone's already ridden.)
Based on the mockups and the early photos - it looks like the ride might load three sets of two cars at a time. That would be 24 passengers per load. Assuming 30-45 seconds for load (if not more), that's still a half-hour / 45 minutes to get everyone in once.