I'm willing to bet we will get maybe three originals max, with or without a ninth house. As stated numerous times before, the IP's bring in the horrendously large crowd, and that means profit for Uni. Even with a few of us copping out and going to other haunts because of overpopulation, they still have a huge exponential growth each year. If you want lots of originals, do what I'll probably be doing next year and head over to HOS, or some local haunts near you, but an original-ran HHN will probably never happen again.
And don't get me wrong, I'll still look into HHN because I haven't completely given up on the event, but depending on the IPs, I might not go.