Update from my earlier post..er, months ago. I did finally receive my contributor's copy (there were some issues with the address AEP had on file for me ), so I can see what bits of my Entertainment district did make it into the book (most of it, with in-jokes mostly intact), and can feel somewhat better prepared to answer questions relating to it, if there are any at this point.
I've answered a few general questions that arose on the AEG forums (fitting with their publicity surrounding the release, there isn't a separate forum for it, but there has been some small discussion of it in the WLD forums), and even pointed over here to this thread for DM_Jeff's succinct description of the core city idea.