I too am skeptical about the show's concept, and I really hope it turns out to be a good show. However if it does maintain the caliber of say, a Universal show, I won't worry about it getting old too quickly. Especially since this is just a summer-time show and it seems like the running time will be 1 1/2 to 2 months at the most, so I think it'll hardly be running long enough to "get old."
But really, in all honesty, I don't care if this show is total crap, or the best thing the park has ever produced. It is replacing Star Spangled Nights and if I don't like it, then I can just decide to not go see it. Something you couldn't do with the previous forms of summer events(unless you avoided the entire park, and/or an entire section of the park).