Clearly, they know the menu, as they need to supply and stock the restaurant. It seems their possibly not informing their customers in hopes it produces excitement of the theme associated with a place to eat. I did not use the word 'restaurant' on purpose. For me, keeping me informed and providing useful information is part of the customer experience (CX), a business reference to ensuring you are meeting expectations. The fact this post exist is because the business is not meeting customer expectations of a resort that typically requires advance planning and reservations for them to meet your expectations of your vacation/visit. Consider it may also have a soft opening (walk-ups) as they may want to say it actually is opening on the special October 1st celebration date.