Personally I don't count Monsters as an IP.I started looking back for the last time there were only 2-3 IPs and got to HH22 and gave up.
I don't mean to be a contrarian but I feel like there are a lot of ideas and theories in this thread that are way off base. :D This is the speculation thread though so carry on . I see the house roster being very similar to this year and the last 5+ years.
That being said, these high numbers for past years mixed with a spectacularly low guest satisfaction on a lot of the IP houses this year, are why we won't see many next year. They're running out of IPs, and guests just did not respond to the ones this year