I understand a stunt show isn't a Broadway show, but from what I know about Broadway most shows do previews for a month. Maybe a little more, maybe a little less. The performers need to get used to their roles, automation needs to work, work on the show itself, test it with audiences, ya know, work out the kinks. Id expect a preview period about that long to be honest. If I recall even, Fallon had previews going for like 3 weeks so to think this plays a few times a day for a month isn't crazy to me. Doubt it opens this year at all but who knows really.