I suspect we'll get Jack because it seems like he's always the fallback when they hit a stumbling block. And I'm sure he moves merch like no other original content.
That said, I agree with your basic point. When a big criticism this year is lack of actors in the marquee houses, not sure adding another house or three will help anything. Honestly I'd rather see effort put toward re-inventing scare-zones for the post-cell phone/huge crowd era, that has been the weakest link this year. Save the big nostalgia parties for 40, 50... Gives more time to develop original content fans want to revisit.