When it comes to HHN announcements, they will go their own way be it off the schedule or unexpected delays, as pasts years show it can vary from year to year.
However, there is something that has been consistent. For the past four HHN's, all the IP houses have been announced at least a month before opening night. And all the houses have been announced at least a month in advance for the past three. (31 was an outlier as the originals were all announced less than a month.)
Opening night is August 28th, so I've got a hunch July will be quite plentiful. And for
@hunnylvr 's sake I really don't think they're going to announce something like Ozzy a mere couple weeks before opening.