I think it will return eventually, if in a slightly altered form. Wicker Man was built as a complete themed experience, and that was something the park was always very keen to emphasise, so I’d be surprised if they didn’t want the pre-show to come back in some capacity.
I think people might possibly be less cautious about distancing within the pre-show room than you might expect. I’ve seen a lot of people saying how keen they are to get back to things like concerts, and indoor concerts are a similar cramming together of people in an indoor space (albeit on a far, far larger scale). They’re also on about reopening nightclubs in June, and people seem very keen to go back to them. Again, nightclubs cram people tightly together in an indoor space.
Once the “threat” has gone, I think people might be more keen to return to old behaviours than you might expect. I’ve seen a lot of social scientists predict a potential repeat of the “Roaring 20s” once the pandemic has subsided, and that would include people going out and socialising and being close together a lot; to “make up for lost time”, if you like.