I'm pretty confident Insidious is returning. Sinister doesn't seem to have much maze potential, Oculus doesn't look much better, Conjuring is out because of the rights issue that I hear is going on, and Paranormal Activity....no. Besides, why not bring back the most successful HHN maze EVER, save money on sets and everything, and save on rights and whatnot when another maze is going to be done by Blumhouse (The Purge). The same thing kind of happened with Lionsgate in 2011 (HoTC and Hostel). Good news is that we probably won't see Walking Dead back as a house since there's already a repeat.
Also, Terror Tram is staying no matter what. Unless they can replace it with another backlot experience (With two houses), it's NOT going. They'll find a replacement. It would hurt their capacity to much to get rid of it.