Your guess is as good as mine! I’m guessing Blood Paradise was pushed back to be published after this book. Could be that AR had this book ready and BP is not, bc planning a wedding is pretty complicated and all that! 

And my guess, based on outside of tumblr discussions, for the PLROA (yes that is our new acronym gawds) book is that it will be mostly Amel telling us how awesome Atlantis was, and why it fell, and that there’s some unresolved thing for Lestat to swim run over there and fix, and then return to lounging around the castle or whatever they’re doing, bc the Proem seems to set up that everything’s been resolved and this is the report after the fact, like QOTD.

UPDATE: She changed the title of Blood Paradise to Prince Lestat and the Realms of Atlantis:

FURTHER, that the Atlantis story had already been smtg she was working on for years and Lestat was added in later: